🏆 We Won the 2026 BBB Torch Award!
Request Service Call Now Contact Us Coupons

Adam Phelps

Adam Phelps

Installation Manager

Rating

Reviews

LICENSES: JOURNEYMEN PLUMBER, GAS SERVICE

With 32 years in the HVAC industry and 30 of those at GSMS, Adam brings a wealth of experience and a
commitment to excellence to his role as Director of Installation. Drawn to the trades by the diverse
opportunities it offers, Adam ensures that every installation is done with future service in mind, making it easier
for our technicians down the road. In his free time, Adam enjoys relaxing, watching movies, and spending time
outdoors. Guided by the motto “keep on truckin’,” Adam values the good people he works with at GSMS and is
proud of the high standards his team maintains in every project.

Name: Adam Phelps

Recent Jobs and Reviews

Rated 5.0 out of 5 stars based on 37 customer reviews

Customers say: The overall sentiment across these reviews is overwhelmingly positive, reflecting high levels of customer satisfaction and appreciation. Customers consistently express enthusiasm about the quality of service they received, with recurring praise for professionalism, expertise, and efficiency. A dominant theme throughout is the technical skill and knowledge demonstrated by the service team, with many reviewers highlighting how thoroughly problems were diagnosed and resolved. The interpersonal qualities of the technicians emerge as another strong positive trend, with customers frequently describing them as friendly, personable, pleasant, and respectful. Communication stands out as a particularly valued aspect, with reviewers appreciating clear explanations, patience in answering questions, and being kept informed throughout the service process. Timeliness and punctuality are consistently mentioned as strengths, alongside respect for customers' property and maintaining clean, orderly work practices. Many customers express strong loyalty and trust in the company, with several indicating they are repeat customers or plan to continue using the service. The tone is enthusiastic and grateful, with multiple reviewers offering strong recommendations and expressing genuine happiness with the results. Overall, these reviews paint a picture of a service provider that excels in both technical competence and customer care, creating consistently positive experiences that foster long-term customer relationships.

Job Locations and Reviews

Was called over because of outdoor unit on fire. Terminals on compressor failed. Causing electrical fire then burning Freon as well. Unit is 20 plus years old. See pictures for replacement.
Was called over because of outdoor unit on fire. Terminals on compressor failed. Causing electrical fire then burning Freon as well. Unit is 20 plus years old. See pictures for replacement.
Adam P.
Adam P. Checked in
Was called over because of outdoor unit on fire. Terminals on compressor failed. Causing electrical fire then burning Freon as well. Unit is 20 plus years old. See pictures for replacement.
Merrimack, NH 03054
Adam P.
Adam P. Checked in
Based on our complete load calculation of your home, a 2-ton system is the exact, proper size required for your space. This option replaces your aging attic AC system with a premium Mitsubishi Heat Pump. Not only will this provide whisper-quiet, incredibly efficient cooling in the summer, but based on your home's balance point, this system will also efficiently handle the vast majority of your heating load during the cooler months! Scope of Work 1. Indoor Equipment & Airflow Upgrades (Attic) Air Handler: We will remove your old equipment and suspend a brand-new Mitsubishi multi-position air handler in the attic. We will cleanly adapt the new unit to your existing, intact supply ductwork. Return Air Modification: To ensure the new system "breathes" correctly, we will upsize one of your ceiling return registers to a larger 12x14 size. Filtration Upgrade: We will remove the restrictive filters currently located in your ceiling grilles, converting them to standard free-flowing grilles
Merrimack, NH 03054
Installation of two separate multi-zone ductless systems to provide cooling and supplemental heating to four primary areas of the home. I designed this "split" layout specifically to minimize the amount of visible refrigerant piping running along the exterior of your siding.

System 1 (Left of Garage): This outdoor unit will be located on the street side of the home, to the left of the garage. This area is already level and ready for our equipment. It will serve:

The Reading Room (Upstairs): A wall-mounted unit.

The Kitchen (Main Floor): A wall-mounted unit directly below the Reading Room.

By grouping these two rooms onto their own outdoor unit, we can run the lines vertically and keep the installation very compact.


System 2 (Back Corner): This outdoor unit will be located at the back corner of the home. It will serve:

The Master Bedroom (Upstairs): A wall-mounted unit.

The Living Room (Main Floor): A wall-mounted unit directly below the Master.

Important Site Work: Please note
Installation of two separate multi-zone ductless systems to provide cooling and supplemental heating to four primary areas of the home. I designed this "split" layout specifically to minimize the amount of visible refrigerant piping running along the exterior of your siding.

System 1 (Left of Garage): This outdoor unit will be located on the street side of the home, to the left of the garage. This area is already level and ready for our equipment. It will serve:

The Reading Room (Upstairs): A wall-mounted unit.

The Kitchen (Main Floor): A wall-mounted unit directly below the Reading Room.

By grouping these two rooms onto their own outdoor unit, we can run the lines vertically and keep the installation very compact.


System 2 (Back Corner): This outdoor unit will be located at the back corner of the home. It will serve:

The Master Bedroom (Upstairs): A wall-mounted unit.

The Living Room (Main Floor): A wall-mounted unit directly below the Master.

Important Site Work: Please note
Adam P.
Adam P. Checked in
Installation of two separate multi-zone ductless systems to provide cooling and supplemental heating to four primary areas of the home. I designed this "split" layout specifically to minimize the amount of visible refrigerant piping running along the exterior of your siding. System 1 (Left of Garage): This outdoor unit will be located on the street side of the home, to the left of the garage. This area is already level and ready for our equipment. It will serve: The Reading Room (Upstairs): A wall-mounted unit. The Kitchen (Main Floor): A wall-mounted unit directly below the Reading Room. By grouping these two rooms onto their own outdoor unit, we can run the lines vertically and keep the installation very compact. System 2 (Back Corner): This outdoor unit will be located at the back corner of the home. It will serve: The Master Bedroom (Upstairs): A wall-mounted unit. The Living Room (Main Floor): A wall-mounted unit directly below the Master. Important Site Work: Please note
Rochester, NH 03867
Adam P.
Adam P. Checked in
Removed Ewc zone damper and installed foam tape to fill void
Merrimack, NH 03054
Project Overview

This option provides a highly efficient, 2-zone ductless system designed to condition the main living area and the rear second-floor bedroom. This is a cost-effective solution utilizing standard heat pump technology for excellent summer cooling and efficient supplemental heating during the spring and fall shoulder seasons.

Scope of Work

1. Indoor Equipment

First Floor: Install one (1) wall-mounted ductless head at the foot of the staircase to handle the primary first-floor load.

Second Floor (Rear Red Bedroom): Install one (1) wall-mounted ductless head on the backyard-facing wall, positioned above the existing mirror.

2. Performance & Temperature Expectations

Second Floor Distribution: The unit in the rear red bedroom is designed to condition that specific room and blow conditioned air out into the hallway to assist the front office and primary bedroom.

Important Note: Because there are no dedicated indoor units in the front rooms with this option, there will
Project Overview

This option provides a highly efficient, 2-zone ductless system designed to condition the main living area and the rear second-floor bedroom. This is a cost-effective solution utilizing standard heat pump technology for excellent summer cooling and efficient supplemental heating during the spring and fall shoulder seasons.

Scope of Work

1. Indoor Equipment

First Floor: Install one (1) wall-mounted ductless head at the foot of the staircase to handle the primary first-floor load.

Second Floor (Rear Red Bedroom): Install one (1) wall-mounted ductless head on the backyard-facing wall, positioned above the existing mirror.

2. Performance & Temperature Expectations

Second Floor Distribution: The unit in the rear red bedroom is designed to condition that specific room and blow conditioned air out into the hallway to assist the front office and primary bedroom.

Important Note: Because there are no dedicated indoor units in the front rooms with this option, there will
Adam P.
Adam P. Checked in
Project Overview This option provides a highly efficient, 2-zone ductless system designed to condition the main living area and the rear second-floor bedroom. This is a cost-effective solution utilizing standard heat pump technology for excellent summer cooling and efficient supplemental heating during the spring and fall shoulder seasons. Scope of Work 1. Indoor Equipment First Floor: Install one (1) wall-mounted ductless head at the foot of the staircase to handle the primary first-floor load. Second Floor (Rear Red Bedroom): Install one (1) wall-mounted ductless head on the backyard-facing wall, positioned above the existing mirror. 2. Performance & Temperature Expectations Second Floor Distribution: The unit in the rear red bedroom is designed to condition that specific room and blow conditioned air out into the hallway to assist the front office and primary bedroom. Important Note: Because there are no dedicated indoor units in the front rooms with this option, there will
Londonderry, NH 03053
Thank you for the opportunity to design a custom heating and cooling solution for your home. Based on our conversations, we are focusing on providing premium, year-round comfort to the two most important spaces in the house: the Master Bedroom and the Great Room.

To achieve this without cluttering your walls, I have designed a 2-zone system utilizing flush-mounted 1-Way Ceiling Cassettes powered by an industry-leading Mitsubishi Hyper Heat outdoor compressor.

Important Sizing Note: As we discussed, this system is specifically engineered and sized to carry the heating and cooling loads for the Master Bedroom and the Great Room only. While it will provide incredible comfort to these spaces even in the dead of winter, you will still need to utilize your home's existing supplemental heating system for the remaining bedrooms, bathrooms, and hallways. It sounds like you were using space heaters to accomplish this.

Scope of Work

1. Indoor Equipment: 1-Way Ceiling Cassettes

We will supply
Thank you for the opportunity to design a custom heating and cooling solution for your home. Based on our conversations, we are focusing on providing premium, year-round comfort to the two most important spaces in the house: the Master Bedroom and the Great Room.

To achieve this without cluttering your walls, I have designed a 2-zone system utilizing flush-mounted 1-Way Ceiling Cassettes powered by an industry-leading Mitsubishi Hyper Heat outdoor compressor.

Important Sizing Note: As we discussed, this system is specifically engineered and sized to carry the heating and cooling loads for the Master Bedroom and the Great Room only. While it will provide incredible comfort to these spaces even in the dead of winter, you will still need to utilize your home's existing supplemental heating system for the remaining bedrooms, bathrooms, and hallways. It sounds like you were using space heaters to accomplish this.

Scope of Work

1. Indoor Equipment: 1-Way Ceiling Cassettes

We will supply
Adam P.
Adam P. Checked in
Thank you for the opportunity to design a custom heating and cooling solution for your home. Based on our conversations, we are focusing on providing premium, year-round comfort to the two most important spaces in the house: the Master Bedroom and the Great Room. To achieve this without cluttering your walls, I have designed a 2-zone system utilizing flush-mounted 1-Way Ceiling Cassettes powered by an industry-leading Mitsubishi Hyper Heat outdoor compressor. Important Sizing Note: As we discussed, this system is specifically engineered and sized to carry the heating and cooling loads for the Master Bedroom and the Great Room only. While it will provide incredible comfort to these spaces even in the dead of winter, you will still need to utilize your home's existing supplemental heating system for the remaining bedrooms, bathrooms, and hallways. It sounds like you were using space heaters to accomplish this. Scope of Work 1. Indoor Equipment: 1-Way Ceiling Cassettes We will supply
Manchester, NH 03103
Review
The team was incredibly skilled and expert in their work. Also, the team was respectful of my property. So happy with the result.
Jeff - Stratham, NH 03885
As discovered during your recent Home Club AC maintenance visit, your current air conditioning system has suffered significant refrigerant loss, with the outdoor York micro-channel coil being the likely culprit. Instead of sinking money into repairing an aging unit, this proposal outlines the replacement of the AC portion of your system. We will be upgrading your cooling equipment to a high-efficiency Lennox EL18 system while fully retaining your existing oil-fired furnace and your current thermostat, as you prefer its operation.

Scope of Work

1. New Cooling Equipment (EL18 Series)

Outdoor Unit: We will safely recover the remaining refrigerant, remove the failing York unit, and install the highly efficient Lennox EL18 condensing unit. This system utilizes advanced technology to provide significantly better energy efficiency and superior summer dehumidification compared to a standard single-speed unit.

Indoor Coil: We will remove the old indoor evaporator coil from the ductwork abov
As discovered during your recent Home Club AC maintenance visit, your current air conditioning system has suffered significant refrigerant loss, with the outdoor York micro-channel coil being the likely culprit. Instead of sinking money into repairing an aging unit, this proposal outlines the replacement of the AC portion of your system. We will be upgrading your cooling equipment to a high-efficiency Lennox EL18 system while fully retaining your existing oil-fired furnace and your current thermostat, as you prefer its operation.

Scope of Work

1. New Cooling Equipment (EL18 Series)

Outdoor Unit: We will safely recover the remaining refrigerant, remove the failing York unit, and install the highly efficient Lennox EL18 condensing unit. This system utilizes advanced technology to provide significantly better energy efficiency and superior summer dehumidification compared to a standard single-speed unit.

Indoor Coil: We will remove the old indoor evaporator coil from the ductwork abov
Adam P.
Adam P. Checked in
As discovered during your recent Home Club AC maintenance visit, your current air conditioning system has suffered significant refrigerant loss, with the outdoor York micro-channel coil being the likely culprit. Instead of sinking money into repairing an aging unit, this proposal outlines the replacement of the AC portion of your system. We will be upgrading your cooling equipment to a high-efficiency Lennox EL18 system while fully retaining your existing oil-fired furnace and your current thermostat, as you prefer its operation. Scope of Work 1. New Cooling Equipment (EL18 Series) Outdoor Unit: We will safely recover the remaining refrigerant, remove the failing York unit, and install the highly efficient Lennox EL18 condensing unit. This system utilizes advanced technology to provide significantly better energy efficiency and superior summer dehumidification compared to a standard single-speed unit. Indoor Coil: We will remove the old indoor evaporator coil from the ductwork abov
Stratham, NH 03885
Review
The service technicians are awesome great friendly guys. The installation was awesome. They did a very efficient job. Glad to be working with GSMS. Thank You!
George - Concord, NH 03303
Adam P.
Adam P. Checked in
This is the ultimate upgrade in oil heating technology, designed specifically to slash your annual oil consumption while providing endless hot water. Alongside the new equipment, we will be completely modernizing your near-boiler piping and upgrading your home's thermostats. Scope of Work 1. High-Efficiency Boiler & Domestic Hot Water The Boiler: We will supply and install an Energy Kinetics System 2000 "Frontier" boiler. The Efficiency Gain: Unlike a heavy cast iron boiler that stays hot all year long (wasting massive amounts of oil in the summer just to maintain temperature), the System 2000 has a very low thermal mass. It heats up instantly when you need it, and utilizes a "thermal purge" to push every last drop of heat into your home or hot water tank before shutting down completely cold. Domestic Hot Water: This system comes paired with its own highly insulated, high-recovery indirect water heater, guaranteeing excellent hot water flow for all your bathrooms. 2. Hydronic Pip
Raymond, NH 03077
Installed gas line for generator
Installed gas line for generator
Adam P.
Adam P. Checked in
Installed gas line for generator
Stoddard, NH 03464
Review
Adam did a great job. He was very professional, experienced, and patient with all my questions and still took the time to do things the right way. GSMS is a hard to find honest and reliable company to work with!
Scott - Auburn, NH 03032
This proposal outlines the installation of a high-efficiency, multi-zone Mitsubishi ductless system designed primarily to provide excellent summer cooling and supplemental shoulder-season heating for your main living level.

Future-Proofing Your Home: As we discussed, we are intentionally sizing the new multi-zone outdoor condenser with extra capacity. This ensures that when you are ready to condition your basement space (near the electrical panel), we can simply return and add a 6,000 BTU indoor head to this existing outdoor unit without needing to upgrade the core equipment.

Scope of Work

1. Outdoor Equipment & Placement

The Condenser: We will supply and set one (1) multi-zone Mitsubishi standard heat pump condenser (cooling-focused) on a new equipment pad.

Location: The unit will be placed on the gable end of the home near the gas meter. We will carefully measure and install the unit to ensure it maintains all strict, code-required clearance distances from the gas utility equipm
This proposal outlines the installation of a high-efficiency, multi-zone Mitsubishi ductless system designed primarily to provide excellent summer cooling and supplemental shoulder-season heating for your main living level.

Future-Proofing Your Home: As we discussed, we are intentionally sizing the new multi-zone outdoor condenser with extra capacity. This ensures that when you are ready to condition your basement space (near the electrical panel), we can simply return and add a 6,000 BTU indoor head to this existing outdoor unit without needing to upgrade the core equipment.

Scope of Work

1. Outdoor Equipment & Placement

The Condenser: We will supply and set one (1) multi-zone Mitsubishi standard heat pump condenser (cooling-focused) on a new equipment pad.

Location: The unit will be placed on the gable end of the home near the gas meter. We will carefully measure and install the unit to ensure it maintains all strict, code-required clearance distances from the gas utility equipm
Adam P.
Adam P. Checked in
This proposal outlines the installation of a high-efficiency, multi-zone Mitsubishi ductless system designed primarily to provide excellent summer cooling and supplemental shoulder-season heating for your main living level. Future-Proofing Your Home: As we discussed, we are intentionally sizing the new multi-zone outdoor condenser with extra capacity. This ensures that when you are ready to condition your basement space (near the electrical panel), we can simply return and add a 6,000 BTU indoor head to this existing outdoor unit without needing to upgrade the core equipment. Scope of Work 1. Outdoor Equipment & Placement The Condenser: We will supply and set one (1) multi-zone Mitsubishi standard heat pump condenser (cooling-focused) on a new equipment pad. Location: The unit will be placed on the gable end of the home near the gas meter. We will carefully measure and install the unit to ensure it maintains all strict, code-required clearance distances from the gas utility equipm
Concord, NH 03303
While we can certainly replace just the problematic heat pump and tie it into your existing furnace, I also wanted to provide you with this option to proactively replace the entire HVAC system.

By replacing both the heat pump and the aging furnace simultaneously, we create a perfectly matched, fully communicating Lennox Dual-Fuel system. This eliminates the need for any third-party interface modules. The new Lennox furnace and heat pump will communicate natively with the S40 Smart Thermostat, seamlessly balancing your heating and cooling loads for the absolute highest efficiency and quietest operation possible.

Scope of Work

1. Outdoor Heat Pump Installation

Equipment: We will supply and install a new, high-efficiency Lennox Heat Pump condenser in the exact same location as your existing unit.

Site Prep & Winterization: We will lay a fresh gravel base and set a new equipment pad. Because this unit will be running in heating mode during the winter, we will securely mount it on an e
While we can certainly replace just the problematic heat pump and tie it into your existing furnace, I also wanted to provide you with this option to proactively replace the entire HVAC system.

By replacing both the heat pump and the aging furnace simultaneously, we create a perfectly matched, fully communicating Lennox Dual-Fuel system. This eliminates the need for any third-party interface modules. The new Lennox furnace and heat pump will communicate natively with the S40 Smart Thermostat, seamlessly balancing your heating and cooling loads for the absolute highest efficiency and quietest operation possible.

Scope of Work

1. Outdoor Heat Pump Installation

Equipment: We will supply and install a new, high-efficiency Lennox Heat Pump condenser in the exact same location as your existing unit.

Site Prep & Winterization: We will lay a fresh gravel base and set a new equipment pad. Because this unit will be running in heating mode during the winter, we will securely mount it on an e
Adam P.
Adam P. Checked in
While we can certainly replace just the problematic heat pump and tie it into your existing furnace, I also wanted to provide you with this option to proactively replace the entire HVAC system. By replacing both the heat pump and the aging furnace simultaneously, we create a perfectly matched, fully communicating Lennox Dual-Fuel system. This eliminates the need for any third-party interface modules. The new Lennox furnace and heat pump will communicate natively with the S40 Smart Thermostat, seamlessly balancing your heating and cooling loads for the absolute highest efficiency and quietest operation possible. Scope of Work 1. Outdoor Heat Pump Installation Equipment: We will supply and install a new, high-efficiency Lennox Heat Pump condenser in the exact same location as your existing unit. Site Prep & Winterization: We will lay a fresh gravel base and set a new equipment pad. Because this unit will be running in heating mode during the winter, we will securely mount it on an e
Auburn, NH 03032
Review
The work was completed on schedule. One small surprise was quickly dealt with by the installers. The “ceiling cassette” option for this AC has made for a system that is aesthetically low-impact, and was worth the extra cost.
Klaatu - Nashua, NH 03062
Adam P.
Adam P. Checked in
Thank you for having me out to evaluate your home's comfort issues! Based on my load calculation, your first-floor cooling issues are stemming from the original installation. The previous contractor attempted to cool both the living room and the kitchen by placing one oversized 15,000 BTU unit in the living room. Because that unit is so large for the space it's actually in, it cools the room too quickly and shuts off before it can pull the humidity out of the air—leaving your living room feeling "cold and clammy" while the kitchen stays hot. The Solution: We are going to add a dedicated, perfectly sized single-zone Mitsubishi mini-split directly into the kitchen where the heat is trapped. By running this new kitchen unit continuously, it will act as the "heavy lifter," efficiently cooling the space and pulling the trapped humidity out of the entire first floor. This will allow you to raise the temperature on your oversized living room unit so it stops short-cycling, finally balancing
Barrington, NH 03825
Per your request, I have revised the mechanical design for your home to an all-cassette configuration. Instead of using a traditional wall-mounted unit in the Master Bedroom, I have upgraded all three zones (Front Sitting Room, Back TV Room, and Master Bedroom) to utilize sleek, flush-mounted 1-way ceiling cassettes. This design provides premium comfort while keeping your wall space completely clear across the entire house.

Important Note: Because I am now adding a third ceiling cassette into the layout, I will need to schedule a brief final site visit to specifically confirm the attic access and structural joist clearance above the Master Bedroom before we officially begin the installation.

Scope of Work

1. Outdoor Equipment

Condenser Installation: We will supply and install one (1) multi-zone Mitsubishi outdoor heat pump condenser on the exterior of your home.

Mounting & Protection: We will safely mount the unit on an elevated equipment pad or snow stand to ensure proper drainag
Per your request, I have revised the mechanical design for your home to an all-cassette configuration. Instead of using a traditional wall-mounted unit in the Master Bedroom, I have upgraded all three zones (Front Sitting Room, Back TV Room, and Master Bedroom) to utilize sleek, flush-mounted 1-way ceiling cassettes. This design provides premium comfort while keeping your wall space completely clear across the entire house.

Important Note: Because I am now adding a third ceiling cassette into the layout, I will need to schedule a brief final site visit to specifically confirm the attic access and structural joist clearance above the Master Bedroom before we officially begin the installation.

Scope of Work

1. Outdoor Equipment

Condenser Installation: We will supply and install one (1) multi-zone Mitsubishi outdoor heat pump condenser on the exterior of your home.

Mounting & Protection: We will safely mount the unit on an elevated equipment pad or snow stand to ensure proper drainag
Adam P.
Adam P. Checked in
Per your request, I have revised the mechanical design for your home to an all-cassette configuration. Instead of using a traditional wall-mounted unit in the Master Bedroom, I have upgraded all three zones (Front Sitting Room, Back TV Room, and Master Bedroom) to utilize sleek, flush-mounted 1-way ceiling cassettes. This design provides premium comfort while keeping your wall space completely clear across the entire house. Important Note: Because I am now adding a third ceiling cassette into the layout, I will need to schedule a brief final site visit to specifically confirm the attic access and structural joist clearance above the Master Bedroom before we officially begin the installation. Scope of Work 1. Outdoor Equipment Condenser Installation: We will supply and install one (1) multi-zone Mitsubishi outdoor heat pump condenser on the exterior of your home. Mounting & Protection: We will safely mount the unit on an elevated equipment pad or snow stand to ensure proper drainag
Nashua, NH 03062
This proposal outlines the installation of a premium 5-Zone Mitsubishi heat pump system. To honor your request of having only one outdoor unit while properly serving all three levels of the home (basement, first floor, and second floor), we have upgraded the design to utilize Mitsubishi’s advanced Smart Multi system. This commercial-grade technology uses a centralized "Branch Box" distribution method, allowing us to run the extended refrigerant line lengths required for this specific floor plan while strictly adhering to manufacturer engineering specifications.

Scope of Work

1. Outdoor Equipment & Distribution

Condenser Placement: Supply and install one (1) Mitsubishi Smart Multi outdoor heat pump condenser. The unit will be located on the gable end of the home (garage side), neatly tucked into the corner where the chimney jogs out.

Attic Branch Box: Install the required Mitsubishi Branch Box up in the attic space. The main refrigerant trunk line will route from the outdoor unit up
This proposal outlines the installation of a premium 5-Zone Mitsubishi heat pump system. To honor your request of having only one outdoor unit while properly serving all three levels of the home (basement, first floor, and second floor), we have upgraded the design to utilize Mitsubishi’s advanced Smart Multi system. This commercial-grade technology uses a centralized "Branch Box" distribution method, allowing us to run the extended refrigerant line lengths required for this specific floor plan while strictly adhering to manufacturer engineering specifications.

Scope of Work

1. Outdoor Equipment & Distribution

Condenser Placement: Supply and install one (1) Mitsubishi Smart Multi outdoor heat pump condenser. The unit will be located on the gable end of the home (garage side), neatly tucked into the corner where the chimney jogs out.

Attic Branch Box: Install the required Mitsubishi Branch Box up in the attic space. The main refrigerant trunk line will route from the outdoor unit up
Adam P.
Adam P. Checked in
This proposal outlines the installation of a premium 5-Zone Mitsubishi heat pump system. To honor your request of having only one outdoor unit while properly serving all three levels of the home (basement, first floor, and second floor), we have upgraded the design to utilize Mitsubishi’s advanced Smart Multi system. This commercial-grade technology uses a centralized "Branch Box" distribution method, allowing us to run the extended refrigerant line lengths required for this specific floor plan while strictly adhering to manufacturer engineering specifications. Scope of Work 1. Outdoor Equipment & Distribution Condenser Placement: Supply and install one (1) Mitsubishi Smart Multi outdoor heat pump condenser. The unit will be located on the gable end of the home (garage side), neatly tucked into the corner where the chimney jogs out. Attic Branch Box: Install the required Mitsubishi Branch Box up in the attic space. The main refrigerant trunk line will route from the outdoor unit up
Merrimack, NH 03054
This proposal outlines the installation of a 3-zone Mitsubishi Hyper Heat ductless system for your home. Because this system will be a primary heat source for the bedrooms, I am utilizing the advanced FX Series indoor heads. These specific units are engineered to deliver their true, rated heating BTUs even in the bitter cold, ensuring your family stays perfectly warm all winter long.

Scope of Work

1. Outdoor Equipment & Site Prep

Condenser Installation: Supply and install one (1) multi-zone Mitsubishi Hyper Heat outdoor condenser on the back side of the home.

Site Preparation: As we discussed during my visit, you will be removing the existing section of fence prior to our arrival so we have the necessary clearance to position the unit in its optimal location.

Winterization: Because this is a Hyper Heat system, we will mount the unit on a heavy-duty snow stand and install a protective weather baffle ("ice hat") to protect the fan motor and coils from winter snow and ice accumulatio
This proposal outlines the installation of a 3-zone Mitsubishi Hyper Heat ductless system for your home. Because this system will be a primary heat source for the bedrooms, I am utilizing the advanced FX Series indoor heads. These specific units are engineered to deliver their true, rated heating BTUs even in the bitter cold, ensuring your family stays perfectly warm all winter long.

Scope of Work

1. Outdoor Equipment & Site Prep

Condenser Installation: Supply and install one (1) multi-zone Mitsubishi Hyper Heat outdoor condenser on the back side of the home.

Site Preparation: As we discussed during my visit, you will be removing the existing section of fence prior to our arrival so we have the necessary clearance to position the unit in its optimal location.

Winterization: Because this is a Hyper Heat system, we will mount the unit on a heavy-duty snow stand and install a protective weather baffle ("ice hat") to protect the fan motor and coils from winter snow and ice accumulatio
Adam P.
Adam P. Checked in
This proposal outlines the installation of a 3-zone Mitsubishi Hyper Heat ductless system for your home. Because this system will be a primary heat source for the bedrooms, I am utilizing the advanced FX Series indoor heads. These specific units are engineered to deliver their true, rated heating BTUs even in the bitter cold, ensuring your family stays perfectly warm all winter long. Scope of Work 1. Outdoor Equipment & Site Prep Condenser Installation: Supply and install one (1) multi-zone Mitsubishi Hyper Heat outdoor condenser on the back side of the home. Site Preparation: As we discussed during my visit, you will be removing the existing section of fence prior to our arrival so we have the necessary clearance to position the unit in its optimal location. Winterization: Because this is a Hyper Heat system, we will mount the unit on a heavy-duty snow stand and install a protective weather baffle ("ice hat") to protect the fan motor and coils from winter snow and ice accumulatio
Concord, NH 03303
Project Overview

Proactively replace the failing existing furnace with a new Lennox Elite Series (EL296V) Two-Stage Gas Furnace. This option retains your existing air conditioning equipment and provides a reliable, high-efficiency heating upgrade with a completely refreshed standard zoning system.

Scope of Work

1. Equipment & Ductwork

Furnace: Install one (1) Lennox EL296V Two-Stage Gas Furnace.

Coil Adaptation: Fabricate custom sheet metal transitions to adapt the new furnace to your existing indoor A-coil.

Filtration: The existing return drop and Air Bear media cabinet are in excellent condition and will be retained.

2. Gas, Venting & Drainage

Gas Piping: Remove the existing CSST flexible gas drop and pipe in a new solid black iron gas drop to the furnace for enhanced safety and durability.

Venting: Remove the existing concentric vent. Install a new 2-pipe PVC intake and exhaust venting system.

Condensate: Reconnect to the existing condensate drain line routed to the exteri
Project Overview

Proactively replace the failing existing furnace with a new Lennox Elite Series (EL296V) Two-Stage Gas Furnace. This option retains your existing air conditioning equipment and provides a reliable, high-efficiency heating upgrade with a completely refreshed standard zoning system.

Scope of Work

1. Equipment & Ductwork

Furnace: Install one (1) Lennox EL296V Two-Stage Gas Furnace.

Coil Adaptation: Fabricate custom sheet metal transitions to adapt the new furnace to your existing indoor A-coil.

Filtration: The existing return drop and Air Bear media cabinet are in excellent condition and will be retained.

2. Gas, Venting & Drainage

Gas Piping: Remove the existing CSST flexible gas drop and pipe in a new solid black iron gas drop to the furnace for enhanced safety and durability.

Venting: Remove the existing concentric vent. Install a new 2-pipe PVC intake and exhaust venting system.

Condensate: Reconnect to the existing condensate drain line routed to the exteri
Adam P.
Adam P. Checked in
Project Overview Proactively replace the failing existing furnace with a new Lennox Elite Series (EL296V) Two-Stage Gas Furnace. This option retains your existing air conditioning equipment and provides a reliable, high-efficiency heating upgrade with a completely refreshed standard zoning system. Scope of Work 1. Equipment & Ductwork Furnace: Install one (1) Lennox EL296V Two-Stage Gas Furnace. Coil Adaptation: Fabricate custom sheet metal transitions to adapt the new furnace to your existing indoor A-coil. Filtration: The existing return drop and Air Bear media cabinet are in excellent condition and will be retained. 2. Gas, Venting & Drainage Gas Piping: Remove the existing CSST flexible gas drop and pipe in a new solid black iron gas drop to the furnace for enhanced safety and durability. Venting: Remove the existing concentric vent. Install a new 2-pipe PVC intake and exhaust venting system. Condensate: Reconnect to the existing condensate drain line routed to the exteri
Derry, NH 03038
Manchester, NH - Installed a new 40 gallon atmospheric natural gas water heater
Adam P.
Adam P. Checked in
Installed a new 40 gallon atmospheric natural gas water heater
Manchester, NH 03109
Adam P.
Adam P. Checked in
Replaced evaporator coil. Pressure check,evacuated,charged
Manchester, NH 03104
This is our highly recommended design utilizing premium Mitsubishi equipment. It utilizes the exact same second-floor layout and standard heat pump capabilities as Design 1, but upgrades the third-floor unit to a low-profile Floor-Mounted Console. Given the specific dimensions and ceiling angles of your third floor, this option provides the absolute cleanest aesthetic and optimal airflow.

Scope of Work

1. Indoor Equipment (Third Floor - Floor Mount)

Third Floor Space: Install one (1) Mitsubishi Floor-Mounted ductless console.

Layout Adjustment: As we discussed during our consultation, utilizing this floor-mounted unit will require a minor rearrangement of the craft table furniture, but it guarantees the most unobtrusive and visually pleasing installation for this unique space. The exterior lines will drop down to meet the second-floor lines in a "T" and run horizontally along the roofline.

2. Indoor Equipment (Second Floor)

Back Guest Bedroom: Install one (1) Mitsubishi wall-moun
This is our highly recommended design utilizing premium Mitsubishi equipment. It utilizes the exact same second-floor layout and standard heat pump capabilities as Design 1, but upgrades the third-floor unit to a low-profile Floor-Mounted Console. Given the specific dimensions and ceiling angles of your third floor, this option provides the absolute cleanest aesthetic and optimal airflow.

Scope of Work

1. Indoor Equipment (Third Floor - Floor Mount)

Third Floor Space: Install one (1) Mitsubishi Floor-Mounted ductless console.

Layout Adjustment: As we discussed during our consultation, utilizing this floor-mounted unit will require a minor rearrangement of the craft table furniture, but it guarantees the most unobtrusive and visually pleasing installation for this unique space. The exterior lines will drop down to meet the second-floor lines in a "T" and run horizontally along the roofline.

2. Indoor Equipment (Second Floor)

Back Guest Bedroom: Install one (1) Mitsubishi wall-moun
Adam P.
Adam P. Checked in
This is our highly recommended design utilizing premium Mitsubishi equipment. It utilizes the exact same second-floor layout and standard heat pump capabilities as Design 1, but upgrades the third-floor unit to a low-profile Floor-Mounted Console. Given the specific dimensions and ceiling angles of your third floor, this option provides the absolute cleanest aesthetic and optimal airflow. Scope of Work 1. Indoor Equipment (Third Floor - Floor Mount) Third Floor Space: Install one (1) Mitsubishi Floor-Mounted ductless console. Layout Adjustment: As we discussed during our consultation, utilizing this floor-mounted unit will require a minor rearrangement of the craft table furniture, but it guarantees the most unobtrusive and visually pleasing installation for this unique space. The exterior lines will drop down to meet the second-floor lines in a "T" and run horizontally along the roofline. 2. Indoor Equipment (Second Floor) Back Guest Bedroom: Install one (1) Mitsubishi wall-moun
Lee, NH 03861
This proposal outlines the installation of high-efficiency 4-Zone Mitsubishi ductless mini-split system. This system is engineered to provide perfectly zoned, independent summer cooling, as well as highly efficient supplemental heating during the shoulder seasons for both the upstairs and basement living spaces.

Scope of Work

1. Outdoor Equipment Installation

Condenser Placement: Supply and install one (1) Mitsubishi 4-Zone outdoor heat pump condenser. The unit will be professionally mounted on the exterior gable end of the home, located to the right of the existing electrical meter.

2. Indoor Air Distribution (4 Wall-Mounted Units)

Supply and install four (4) precisely sized Mitsubishi wall-mounted ductless air handlers in the following dedicated zones:

Zone 1: Basement Living Room: Mounted on the entry wall adjacent to the electrical panel for optimal airflow distribution across the living space.

Zone 2: Basement Bedroom: Strategically mounted on the back wall near the right r
This proposal outlines the installation of high-efficiency 4-Zone Mitsubishi ductless mini-split system. This system is engineered to provide perfectly zoned, independent summer cooling, as well as highly efficient supplemental heating during the shoulder seasons for both the upstairs and basement living spaces.

Scope of Work

1. Outdoor Equipment Installation

Condenser Placement: Supply and install one (1) Mitsubishi 4-Zone outdoor heat pump condenser. The unit will be professionally mounted on the exterior gable end of the home, located to the right of the existing electrical meter.

2. Indoor Air Distribution (4 Wall-Mounted Units)

Supply and install four (4) precisely sized Mitsubishi wall-mounted ductless air handlers in the following dedicated zones:

Zone 1: Basement Living Room: Mounted on the entry wall adjacent to the electrical panel for optimal airflow distribution across the living space.

Zone 2: Basement Bedroom: Strategically mounted on the back wall near the right r
Adam P.
Adam P. Checked in
This proposal outlines the installation of high-efficiency 4-Zone Mitsubishi ductless mini-split system. This system is engineered to provide perfectly zoned, independent summer cooling, as well as highly efficient supplemental heating during the shoulder seasons for both the upstairs and basement living spaces. Scope of Work 1. Outdoor Equipment Installation Condenser Placement: Supply and install one (1) Mitsubishi 4-Zone outdoor heat pump condenser. The unit will be professionally mounted on the exterior gable end of the home, located to the right of the existing electrical meter. 2. Indoor Air Distribution (4 Wall-Mounted Units) Supply and install four (4) precisely sized Mitsubishi wall-mounted ductless air handlers in the following dedicated zones: Zone 1: Basement Living Room: Mounted on the entry wall adjacent to the electrical panel for optimal airflow distribution across the living space. Zone 2: Basement Bedroom: Strategically mounted on the back wall near the right r
Concord, NH 03303
This proposal outlines the replacement of your aging oil boiler and internal tankless hot water coil. We have designed this upgrade around the ultra-efficient Energy Kinetics System 2000 Resolute.

Unlike your current setup, this highly advanced, low-mass boiler eliminates standby heat loss, drastically reducing your annual oil consumption. Furthermore, the Resolute model allows for direct sidewall venting, which means we can completely eliminate your current noisy power vent setup in favor of a much quieter, cleaner, and safer dedicated intake and exhaust system.

Scope of Work

1. Equipment Removal & Venting Modernization

Demolition: Safely drain, disconnect, and remove the existing oil boiler.

Power Vent Elimination: We will completely remove the existing, noisy power vent. The new System 2000 Resolute utilizes direct sidewall venting, meaning we will pipe dedicated fresh air intake and exhaust directly through the exterior wall.

2. High-Efficiency Boiler & Hot Water Installation
This proposal outlines the replacement of your aging oil boiler and internal tankless hot water coil. We have designed this upgrade around the ultra-efficient Energy Kinetics System 2000 Resolute.

Unlike your current setup, this highly advanced, low-mass boiler eliminates standby heat loss, drastically reducing your annual oil consumption. Furthermore, the Resolute model allows for direct sidewall venting, which means we can completely eliminate your current noisy power vent setup in favor of a much quieter, cleaner, and safer dedicated intake and exhaust system.

Scope of Work

1. Equipment Removal & Venting Modernization

Demolition: Safely drain, disconnect, and remove the existing oil boiler.

Power Vent Elimination: We will completely remove the existing, noisy power vent. The new System 2000 Resolute utilizes direct sidewall venting, meaning we will pipe dedicated fresh air intake and exhaust directly through the exterior wall.

2. High-Efficiency Boiler & Hot Water Installation
Adam P.
Adam P. Checked in
This proposal outlines the replacement of your aging oil boiler and internal tankless hot water coil. We have designed this upgrade around the ultra-efficient Energy Kinetics System 2000 Resolute. Unlike your current setup, this highly advanced, low-mass boiler eliminates standby heat loss, drastically reducing your annual oil consumption. Furthermore, the Resolute model allows for direct sidewall venting, which means we can completely eliminate your current noisy power vent setup in favor of a much quieter, cleaner, and safer dedicated intake and exhaust system. Scope of Work 1. Equipment Removal & Venting Modernization Demolition: Safely drain, disconnect, and remove the existing oil boiler. Power Vent Elimination: We will completely remove the existing, noisy power vent. The new System 2000 Resolute utilizes direct sidewall venting, meaning we will pipe dedicated fresh air intake and exhaust directly through the exterior wall. 2. High-Efficiency Boiler & Hot Water Installation
Pembroke, NH 03275
Adam P.
Adam P. Checked in
Replacement of failing oil-fired hot water heater with a new hybrid electric water heater. A new dedicated 240V electrical circuit will be installed from the panel to the water heater location. Existing oil flu will be capped off. A condensate pump for moisture removal will be installed.
Bedford, NH 03110
This proposal outlines the complete replacement of your existing Lennox R-410A two-zone mini-split system. We will be upgrading the equipment serving your Master Bedroom and Great Room to ensure reliable, high-efficiency cooling and supplemental heating.

To provide the most cost-effective and clean installation possible, we will be reusing the Fortress line hide and heavy-duty exterior wall bracket that our team previously installed, while completely replacing all the internal working components (copper, wiring, and equipment).

Scope of Work

1. Equipment Removal & Preparation

Safely disconnect, recover existing refrigerant, and remove the failing Lennox indoor and outdoor equipment.

Prepare the existing GSMS-installed outdoor wall bracket to accept the new condenser.

2. New Indoor & Outdoor Equipment

Indoor Air Handlers: Supply and install two (2) perfectly sized, high-efficiency wall-mounted ductless heads located in the Master Bedroom and the Great Room.

Outdoor Condenser: Su
This proposal outlines the complete replacement of your existing Lennox R-410A two-zone mini-split system. We will be upgrading the equipment serving your Master Bedroom and Great Room to ensure reliable, high-efficiency cooling and supplemental heating.

To provide the most cost-effective and clean installation possible, we will be reusing the Fortress line hide and heavy-duty exterior wall bracket that our team previously installed, while completely replacing all the internal working components (copper, wiring, and equipment).

Scope of Work

1. Equipment Removal & Preparation

Safely disconnect, recover existing refrigerant, and remove the failing Lennox indoor and outdoor equipment.

Prepare the existing GSMS-installed outdoor wall bracket to accept the new condenser.

2. New Indoor & Outdoor Equipment

Indoor Air Handlers: Supply and install two (2) perfectly sized, high-efficiency wall-mounted ductless heads located in the Master Bedroom and the Great Room.

Outdoor Condenser: Su
Adam P.
Adam P. Checked in
This proposal outlines the complete replacement of your existing Lennox R-410A two-zone mini-split system. We will be upgrading the equipment serving your Master Bedroom and Great Room to ensure reliable, high-efficiency cooling and supplemental heating. To provide the most cost-effective and clean installation possible, we will be reusing the Fortress line hide and heavy-duty exterior wall bracket that our team previously installed, while completely replacing all the internal working components (copper, wiring, and equipment). Scope of Work 1. Equipment Removal & Preparation Safely disconnect, recover existing refrigerant, and remove the failing Lennox indoor and outdoor equipment. Prepare the existing GSMS-installed outdoor wall bracket to accept the new condenser. 2. New Indoor & Outdoor Equipment Indoor Air Handlers: Supply and install two (2) perfectly sized, high-efficiency wall-mounted ductless heads located in the Master Bedroom and the Great Room. Outdoor Condenser: Su
Londonderry, NH 03053
Review
Excellent, prompt service
John - Hollis, NH 03049
Project Overview

Supply and install a multi-zone ductless heat pump system to serve both the Master Bedroom and the first-floor Family Room. This solution allows for independent temperature control in each space, providing high-efficiency cooling, dehumidification, and supplemental heating.

Scope of Work

1. Equipment Installation

Master Bedroom (Indoor Unit A): Install one (1) High-Wall Indoor Unit, positioned on the wall facing the backyard.

Family Room (Indoor Unit B): Install one (1) High-Wall Indoor Unit in the location of the existing in-wall A/C.

Outdoor Unit: Position the outdoor condenser on the ground level underneath the bay window.

Client Responsibilities: * Shrub Relocation: Client will need to relocate one shrub to provide clearance for the outdoor unit.

Carpentry: Client to have their carpenter remove the existing in-wall A/C unit and patch/finish the wall opening prior to our installation so the new indoor unit can be mounted seamlessly over that location.

2. Li
Project Overview

Supply and install a multi-zone ductless heat pump system to serve both the Master Bedroom and the first-floor Family Room. This solution allows for independent temperature control in each space, providing high-efficiency cooling, dehumidification, and supplemental heating.

Scope of Work

1. Equipment Installation

Master Bedroom (Indoor Unit A): Install one (1) High-Wall Indoor Unit, positioned on the wall facing the backyard.

Family Room (Indoor Unit B): Install one (1) High-Wall Indoor Unit in the location of the existing in-wall A/C.

Outdoor Unit: Position the outdoor condenser on the ground level underneath the bay window.

Client Responsibilities: * Shrub Relocation: Client will need to relocate one shrub to provide clearance for the outdoor unit.

Carpentry: Client to have their carpenter remove the existing in-wall A/C unit and patch/finish the wall opening prior to our installation so the new indoor unit can be mounted seamlessly over that location.

2. Li
Adam P.
Adam P. Checked in
Project Overview Supply and install a multi-zone ductless heat pump system to serve both the Master Bedroom and the first-floor Family Room. This solution allows for independent temperature control in each space, providing high-efficiency cooling, dehumidification, and supplemental heating. Scope of Work 1. Equipment Installation Master Bedroom (Indoor Unit A): Install one (1) High-Wall Indoor Unit, positioned on the wall facing the backyard. Family Room (Indoor Unit B): Install one (1) High-Wall Indoor Unit in the location of the existing in-wall A/C. Outdoor Unit: Position the outdoor condenser on the ground level underneath the bay window. Client Responsibilities: * Shrub Relocation: Client will need to relocate one shrub to provide clearance for the outdoor unit. Carpentry: Client to have their carpenter remove the existing in-wall A/C unit and patch/finish the wall opening prior to our installation so the new indoor unit can be mounted seamlessly over that location. 2. Li
Hollis, NH 03049
Replacement of the existing tank-style water heater. Install a 40-gallon indirect tank as a new zone off the existing boiler. The boiler was prepiped and set up to allow for this plan in the future.
Replacement of the existing tank-style water heater. Install a 40-gallon indirect tank as a new zone off the existing boiler. The boiler was prepiped and set up to allow for this plan in the future.
Adam P.
Adam P. Checked in
Replacement of the existing tank-style water heater. Install a 40-gallon indirect tank as a new zone off the existing boiler. The boiler was prepiped and set up to allow for this plan in the future.
Manchester, NH 03102
Review
Adam & Quinn just left after finishing the installation of my new Lennox Air Conditioning unit. As always, they are very personable and professional. Adam explains everything to me before he leaves and I am very comfortable with my new system. I would not hesitate to recommend GSMS and have done so in the past.
Deb - Hooksett, NH 03106
Review
Excellent!!!
Kathleen - Merrimack, NH 03054
Review
Arrived on time, organized equipment. Friendly, answered all my “many questions”. Adam made sure all the equipment was in working order. Excellent service.
Kathleen - Merrimack, NH 03054
Review
Working with GSMS was a fantastic experience. There was attention to detail from the estimate to the clean up at the end of the project. Especially during the planning process, Zak helped me evaluate different options, quickly readjusted as I changed my mind... without ANY pressure! Superior, prompt communication during the whole (and post) process.
Ethel - Londonderry, NH 03053
Review
Excellent service
Paul - Nashua, NH 03062
Review
Excellent Service
26 - Manchester, NH 03102
Review
Everything about my experience has been great. I always appreciate a company who doesn’t bat an eye at my many questions. Fantastic customer service all around and a great install experience. Adam was fantastic!
Lauren - Durham, NH 03824
Review
Adam is amazing! Friendly, professional, competent and clearly explains technical issues.
Robert Fielding - Concord, NH 03301
Review
Excellent in all areas of service. Punctual, courteous, kept us well informed of service progress. Upon completion of the furnace installation Adam explained all features of the new system , and addressed questions . The above statement can be said of all GSMS employees as we have used them over the years for several different systems installation. Excellent in all areas.
Bob M - Merrimack, NH 03054
Review
The hot water tank leaked resulting in lots of water in the basement. Adam removed the old tank and installed a new one. The install looks great and got hot water back.
Lori - Nashua, NH 03060
Trusted Quality & Service