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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 33 customer reviews

Customers say: The recent reviews exhibit a predominantly positive sentiment, with recurring themes of satisfaction, professionalism, and expertise. Customers express gratitude, recommend the company, and acknowledge the quality of the work performed. Positive reviews frequently mention friendly and knowledgeable technicians, timely responses, and efficient service. Negative reviews are minimal and do not represent a clear, recurring trend. Overall, the reviews suggest a positive experience with the company, with many customers expressing satisfaction with their HVAC and plumbing needs.

Job Locations and Reviews

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
Replacement of the existing hydronic air handler and central air system with a new high-efficiency hybrid heat pump system.

A new First Co hydronic air handler will be installed. This unit features a variable-speed motor for quiet and efficient operation, and it has a built-in hydronic coil for heating. We will install a new return air base with a new air filtration system. The new coil will be re-connected to the existing oil boiler zone, just as the previous system was. The existing ductwork connections will be remade to the new system, and both returns will be reconnected.

A new lineset will be run from the outdoor unit to the interior. If a new line cannot be run, we will purge and clean the existing lineset using our cleaning agent.

Outside, a new heat pump unit will be installed on the existing concrete pad. The new unit will be elevated on "footies" to assist with defrost cycles and prevent freezing. A new Lennox s40 smart Wi-Fi thermostat will control the system, with a bala
Replacement of the existing hydronic air handler and central air system with a new high-efficiency hybrid heat pump system.

A new First Co hydronic air handler will be installed. This unit features a variable-speed motor for quiet and efficient operation, and it has a built-in hydronic coil for heating. We will install a new return air base with a new air filtration system. The new coil will be re-connected to the existing oil boiler zone, just as the previous system was. The existing ductwork connections will be remade to the new system, and both returns will be reconnected.

A new lineset will be run from the outdoor unit to the interior. If a new line cannot be run, we will purge and clean the existing lineset using our cleaning agent.

Outside, a new heat pump unit will be installed on the existing concrete pad. The new unit will be elevated on "footies" to assist with defrost cycles and prevent freezing. A new Lennox s40 smart Wi-Fi thermostat will control the system, with a bala
Adam P.
Adam P. Checked in
Replacement of the existing hydronic air handler and central air system with a new high-efficiency hybrid heat pump system. A new First Co hydronic air handler will be installed. This unit features a variable-speed motor for quiet and efficient operation, and it has a built-in hydronic coil for heating. We will install a new return air base with a new air filtration system. The new coil will be re-connected to the existing oil boiler zone, just as the previous system was. The existing ductwork connections will be remade to the new system, and both returns will be reconnected. A new lineset will be run from the outdoor unit to the interior. If a new line cannot be run, we will purge and clean the existing lineset using our cleaning agent. Outside, a new heat pump unit will be installed on the existing concrete pad. The new unit will be elevated on "footies" to assist with defrost cycles and prevent freezing. A new Lennox s40 smart Wi-Fi thermostat will control the system, with a bala
Bedford, NH 03110
Installed Lennox heat pump
Installed Lennox heat pump
Adam P.
Adam P. Checked in
Installed Lennox heat pump
Bedford, NH 03110
Windham, NH - Project Overview

During our recent service visit, Jack, noted significant scale buildup and active corrosion on several internal valves and fittings within your 11-year-old Rinnai tankless water heater. Given the age of the unit (originally installed during the home's construction) and the cost of rebuilding these internal components, we strongly recommend proactively replacing the unit. Upgrading now prevents a sudden failure and provides you with a brand-new system, full factory warranties, and renewed efficiency.

Scope of Work

1. Equipment Removal & Installation

Removal: Safely drain, disconnect, and remove the existing 11-year-old Rinnai tankless water heater.

Installation: Supply and mount a new, high-efficiency Rinnai Tankless Water Heater in the existing location.

Connections: Install new hot and cold water isolation valves (required for future maintenance and flushing) and reconnect to the existing gas and water lines.

2. Recirculation System

Integration: Your home is a
Adam P.
Adam P. Checked in
Project Overview During our recent service visit, Jack, noted significant scale buildup and active corrosion on several internal valves and fittings within your 11-year-old Rinnai tankless water heater. Given the age of the unit (originally installed during the home's construction) and the cost of rebuilding these internal components, we strongly recommend proactively replacing the unit. Upgrading now prevents a sudden failure and provides you with a brand-new system, full factory warranties, and renewed efficiency. Scope of Work 1. Equipment Removal & Installation Removal: Safely drain, disconnect, and remove the existing 11-year-old Rinnai tankless water heater. Installation: Supply and mount a new, high-efficiency Rinnai Tankless Water Heater in the existing location. Connections: Install new hot and cold water isolation valves (required for future maintenance and flushing) and reconnect to the existing gas and water lines. 2. Recirculation System Integration: Your home is a
Windham, NH 03087
Adam P.
Adam P. Checked in
Removed old boiler. Tightened tankless coil
Merrimack, NH 03054
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
We will replace the original system with a new high-efficiency Lennox system, upgrading from the existing 80% efficient furnace to a 90+% efficient model. The existing furnace vent will be capped off, and a new vent will be installed to exit through the side wall of the garage. This will be white PVC, which can be painted to match the exterior of the home. We can provide a photo of the proposed vent location for condo association approval if needed.

The new system will be installed in the same location, with any necessary modifications to ensure a proper fit. Outside, a new condensing unit will be installed. The existing lineset will be flushed and re-used due to the limited accessibility of the installation path. A final site visit will be needed to confirm the most appropriate location for the outdoor unit.

A new Wi-Fi thermostat will be installed, offering user-friendly control at home and the ability to monitor and adjust your system remotely while traveling.
We will replace the original system with a new high-efficiency Lennox system, upgrading from the existing 80% efficient furnace to a 90+% efficient model. The existing furnace vent will be capped off, and a new vent will be installed to exit through the side wall of the garage. This will be white PVC, which can be painted to match the exterior of the home. We can provide a photo of the proposed vent location for condo association approval if needed.

The new system will be installed in the same location, with any necessary modifications to ensure a proper fit. Outside, a new condensing unit will be installed. The existing lineset will be flushed and re-used due to the limited accessibility of the installation path. A final site visit will be needed to confirm the most appropriate location for the outdoor unit.

A new Wi-Fi thermostat will be installed, offering user-friendly control at home and the ability to monitor and adjust your system remotely while traveling.
Adam P.
Adam P. Checked in
We will replace the original system with a new high-efficiency Lennox system, upgrading from the existing 80% efficient furnace to a 90+% efficient model. The existing furnace vent will be capped off, and a new vent will be installed to exit through the side wall of the garage. This will be white PVC, which can be painted to match the exterior of the home. We can provide a photo of the proposed vent location for condo association approval if needed. The new system will be installed in the same location, with any necessary modifications to ensure a proper fit. Outside, a new condensing unit will be installed. The existing lineset will be flushed and re-used due to the limited accessibility of the installation path. A final site visit will be needed to confirm the most appropriate location for the outdoor unit. A new Wi-Fi thermostat will be installed, offering user-friendly control at home and the ability to monitor and adjust your system remotely while traveling.
Hooksett, NH 03106
Project Overview

Supply and install a new Lennox Signature Series (SLP99V) Variable Speed Gas Furnace. This system offers the highest level of precision, modulating its output in 1% increments to maintain exact temperatures while integrating seamlessly with the existing Rheem AC and new Lennox S40 smart controls.

Scope of Work

1. Equipment Installation & Adaptation

Furnace: Install Lennox SLP99V Variable Speed Gas Furnace.

Coil Adaptation: Fabricate custom sheet metal transitions to mate the new furnace width and height to the existing Rheem evaporative coil (installed 2020).

Return Drop: Modify the existing return drop to accommodate the new filtration cabinet.

2. Venting & Drainage

Venting Upgrade: Disconnect existing 3" venting. Install new 2" PVC intake and exhaust piping, utilizing the existing path to the exterior termination point.

Condensate Management: Eliminate the existing floor drain setup. Install a new condensate pump and route vinyl tubing to discharge water to
Project Overview

Supply and install a new Lennox Signature Series (SLP99V) Variable Speed Gas Furnace. This system offers the highest level of precision, modulating its output in 1% increments to maintain exact temperatures while integrating seamlessly with the existing Rheem AC and new Lennox S40 smart controls.

Scope of Work

1. Equipment Installation & Adaptation

Furnace: Install Lennox SLP99V Variable Speed Gas Furnace.

Coil Adaptation: Fabricate custom sheet metal transitions to mate the new furnace width and height to the existing Rheem evaporative coil (installed 2020).

Return Drop: Modify the existing return drop to accommodate the new filtration cabinet.

2. Venting & Drainage

Venting Upgrade: Disconnect existing 3" venting. Install new 2" PVC intake and exhaust piping, utilizing the existing path to the exterior termination point.

Condensate Management: Eliminate the existing floor drain setup. Install a new condensate pump and route vinyl tubing to discharge water to
Adam P.
Adam P. Checked in
Project Overview Supply and install a new Lennox Signature Series (SLP99V) Variable Speed Gas Furnace. This system offers the highest level of precision, modulating its output in 1% increments to maintain exact temperatures while integrating seamlessly with the existing Rheem AC and new Lennox S40 smart controls. Scope of Work 1. Equipment Installation & Adaptation Furnace: Install Lennox SLP99V Variable Speed Gas Furnace. Coil Adaptation: Fabricate custom sheet metal transitions to mate the new furnace width and height to the existing Rheem evaporative coil (installed 2020). Return Drop: Modify the existing return drop to accommodate the new filtration cabinet. 2. Venting & Drainage Venting Upgrade: Disconnect existing 3" venting. Install new 2" PVC intake and exhaust piping, utilizing the existing path to the exterior termination point. Condensate Management: Eliminate the existing floor drain setup. Install a new condensate pump and route vinyl tubing to discharge water to
Sandown, NH 03873
Replaced indirect temp sensor.
Replaced indirect temp sensor.
Adam P.
Adam P. Checked in
Replaced indirect temp sensor.
Barrington, NH 03825
Project Scope:
We will install a complete makeup air solution to balance the new high-CFM kitchen hood. Following approval from the Mechanical Inspector, this system will be installed in the basement and integrated directly into the existing HVAC return ductwork, eliminating the need for a separate floor register in the kitchen.

Equipment & Operation:
We will install the Fantech MUAS 750 Makeup Air System.

Capacity: This unit provides up to 750 CFM of fresh air to match the Thermador Hood exhaust rate.

Intelligent Modulation: The unit utilizes a pressure transducer to sense the hood speed and automatically modulates the intake fan. This ensures we only bring in the exact amount of air needed to balance the home pressure.

Mandatory Pre-Conditioning (Electric Heater):
Per the Mechanical Inspector's requirement for injecting outside air into a forced air heating system, we will install an Electric Duct Heater inline with the makeup air unit.

Function: This heater will temper the inco
Project Scope:
We will install a complete makeup air solution to balance the new high-CFM kitchen hood. Following approval from the Mechanical Inspector, this system will be installed in the basement and integrated directly into the existing HVAC return ductwork, eliminating the need for a separate floor register in the kitchen.

Equipment & Operation:
We will install the Fantech MUAS 750 Makeup Air System.

Capacity: This unit provides up to 750 CFM of fresh air to match the Thermador Hood exhaust rate.

Intelligent Modulation: The unit utilizes a pressure transducer to sense the hood speed and automatically modulates the intake fan. This ensures we only bring in the exact amount of air needed to balance the home pressure.

Mandatory Pre-Conditioning (Electric Heater):
Per the Mechanical Inspector's requirement for injecting outside air into a forced air heating system, we will install an Electric Duct Heater inline with the makeup air unit.

Function: This heater will temper the inco
Adam P.
Adam P. Checked in
Project Scope: We will install a complete makeup air solution to balance the new high-CFM kitchen hood. Following approval from the Mechanical Inspector, this system will be installed in the basement and integrated directly into the existing HVAC return ductwork, eliminating the need for a separate floor register in the kitchen. Equipment & Operation: We will install the Fantech MUAS 750 Makeup Air System. Capacity: This unit provides up to 750 CFM of fresh air to match the Thermador Hood exhaust rate. Intelligent Modulation: The unit utilizes a pressure transducer to sense the hood speed and automatically modulates the intake fan. This ensures we only bring in the exact amount of air needed to balance the home pressure. Mandatory Pre-Conditioning (Electric Heater): Per the Mechanical Inspector's requirement for injecting outside air into a forced air heating system, we will install an Electric Duct Heater inline with the makeup air unit. Function: This heater will temper the inco
Manchester, NH 03104
Manchester, NH - Found pressure switch stuck closed. Replaced with universal
Adam P.
Adam P. Checked in
Found pressure switch stuck closed. Replaced with universal
Manchester, NH 03109
Project Overview

Due to the failure of the existing indirect coil and the age of the equipment, we propose replacing the entire system with a new Advantage Oil Boiler. This installation includes a new 40-gallon indirect water heater to handle the home's domestic hot water needs. The system will be piped for three distinct zones: First Floor, Second Floor, and the Indirect Tank.


Scope of Work

1. Boiler & Piping Installation

Boiler: Install one (1) Advantage Oil Boiler.

Near-Boiler Piping: Remove all old near-boiler piping and replace with new copper piping.

Circulation: Install three (3) new dedicated circulator pumps to control the First Floor, Second Floor, and Indirect Tank zones.


2. Domestic Hot Water

Install a new 40-Gallon Indirect Water Heater. This tank is heated by the boiler, providing ample hot water recovery for the home.


3. Venting & Fuel

Venting: The new boiler will be connected to the existing power vent system. Our Service Specialists will verify the power v
Project Overview

Due to the failure of the existing indirect coil and the age of the equipment, we propose replacing the entire system with a new Advantage Oil Boiler. This installation includes a new 40-gallon indirect water heater to handle the home's domestic hot water needs. The system will be piped for three distinct zones: First Floor, Second Floor, and the Indirect Tank.


Scope of Work

1. Boiler & Piping Installation

Boiler: Install one (1) Advantage Oil Boiler.

Near-Boiler Piping: Remove all old near-boiler piping and replace with new copper piping.

Circulation: Install three (3) new dedicated circulator pumps to control the First Floor, Second Floor, and Indirect Tank zones.


2. Domestic Hot Water

Install a new 40-Gallon Indirect Water Heater. This tank is heated by the boiler, providing ample hot water recovery for the home.


3. Venting & Fuel

Venting: The new boiler will be connected to the existing power vent system. Our Service Specialists will verify the power v
Adam P.
Adam P. Checked in
Project Overview Due to the failure of the existing indirect coil and the age of the equipment, we propose replacing the entire system with a new Advantage Oil Boiler. This installation includes a new 40-gallon indirect water heater to handle the home's domestic hot water needs. The system will be piped for three distinct zones: First Floor, Second Floor, and the Indirect Tank. Scope of Work 1. Boiler & Piping Installation Boiler: Install one (1) Advantage Oil Boiler. Near-Boiler Piping: Remove all old near-boiler piping and replace with new copper piping. Circulation: Install three (3) new dedicated circulator pumps to control the First Floor, Second Floor, and Indirect Tank zones. 2. Domestic Hot Water Install a new 40-Gallon Indirect Water Heater. This tank is heated by the boiler, providing ample hot water recovery for the home. 3. Venting & Fuel Venting: The new boiler will be connected to the existing power vent system. Our Service Specialists will verify the power v
Chester, NH 03036
Adam P.
Adam P. Checked in
Customer had no heat. Found blown 1 amp fuse in zone panel
Merrimack, NH 03054
Installation of a multi-zone mini-split system to provide the main house with priority cooling.

Note on Heating: This system is sized and designed primarily for the cooling load. While it will provide supplemental heating during shoulder seasons, it is not designed to provide the total heating load for the home during winter.

System Overview
A multi-zone outdoor unit will be placed in a central location on the back side of the home. This system is sized to handle the current load with enough remaining capacity to add an additional 6,000 BTU head for the second bedroom in the future (a great selling feature).

Indoor Unit Locations & Routing
TV Room / Kitchen: The indoor unit will be installed to the left of the slider. The lineset will run down through the deck into the unfinished basement, run across, and penetrate out to the outdoor unit. This ensures a clean finish and allows a future contractor to easily refinish the deck around the lineset.

Great Room / Living Area: The unit wi
Installation of a multi-zone mini-split system to provide the main house with priority cooling.

Note on Heating: This system is sized and designed primarily for the cooling load. While it will provide supplemental heating during shoulder seasons, it is not designed to provide the total heating load for the home during winter.

System Overview
A multi-zone outdoor unit will be placed in a central location on the back side of the home. This system is sized to handle the current load with enough remaining capacity to add an additional 6,000 BTU head for the second bedroom in the future (a great selling feature).

Indoor Unit Locations & Routing
TV Room / Kitchen: The indoor unit will be installed to the left of the slider. The lineset will run down through the deck into the unfinished basement, run across, and penetrate out to the outdoor unit. This ensures a clean finish and allows a future contractor to easily refinish the deck around the lineset.

Great Room / Living Area: The unit wi
Adam P.
Adam P. Checked in
Installation of a multi-zone mini-split system to provide the main house with priority cooling. Note on Heating: This system is sized and designed primarily for the cooling load. While it will provide supplemental heating during shoulder seasons, it is not designed to provide the total heating load for the home during winter. System Overview A multi-zone outdoor unit will be placed in a central location on the back side of the home. This system is sized to handle the current load with enough remaining capacity to add an additional 6,000 BTU head for the second bedroom in the future (a great selling feature). Indoor Unit Locations & Routing TV Room / Kitchen: The indoor unit will be installed to the left of the slider. The lineset will run down through the deck into the unfinished basement, run across, and penetrate out to the outdoor unit. This ensures a clean finish and allows a future contractor to easily refinish the deck around the lineset. Great Room / Living Area: The unit wi
Hampstead, NH 03841
Adam P.
Adam P. Checked in
Install hose bib
Manchester, NH 03109
Heat exchanger has a blockage. Will need to replace as well as with the LP conversion kit. The low pressure switch does not appear to be installed, so we will need to install a new LP conversion kit with the low pressure switch.

The heat exchanger will be covered under Lennox warranty, however it is understood that should Lennox request an inspection of the heat exchanger, there is a chance the warranty may be denied due to the pressure switch never being installed.

Based on the venting, we will need to replace the concentric vent kit with Lennox Accelerator-style venting. The venting will also be adjusted to terminate out the bay over to provide proper separation from the Rinnai vent.
Heat exchanger has a blockage. Will need to replace as well as with the LP conversion kit. The low pressure switch does not appear to be installed, so we will need to install a new LP conversion kit with the low pressure switch.

The heat exchanger will be covered under Lennox warranty, however it is understood that should Lennox request an inspection of the heat exchanger, there is a chance the warranty may be denied due to the pressure switch never being installed.

Based on the venting, we will need to replace the concentric vent kit with Lennox Accelerator-style venting. The venting will also be adjusted to terminate out the bay over to provide proper separation from the Rinnai vent.
Adam P.
Adam P. Checked in
Heat exchanger has a blockage. Will need to replace as well as with the LP conversion kit. The low pressure switch does not appear to be installed, so we will need to install a new LP conversion kit with the low pressure switch. The heat exchanger will be covered under Lennox warranty, however it is understood that should Lennox request an inspection of the heat exchanger, there is a chance the warranty may be denied due to the pressure switch never being installed. Based on the venting, we will need to replace the concentric vent kit with Lennox Accelerator-style venting. The venting will also be adjusted to terminate out the bay over to provide proper separation from the Rinnai vent.
Hopkinton, NH 03229
Estimate Summary: Complete replacement of the existing failed heating and cooling system with our Lennox Signature Series. This system features fully Variable-Speed technology for both heating and cooling, providing the quietest operation and the most precise temperature and humidity control available.

Heating & Cooling Equipment: We will remove the existing furnace and AC and install the Lennox Signature Variable-Speed Gas Furnace paired with the matching Variable-Speed Air Conditioner. The system will be controlled by the new Lennox S40 Smart Thermostat, which acts as the communication hub for the equipment.

Indoor Air Quality & Accessories: We will install the Lennox PureAir Carbon Catalyst UV light system to actively clean the air and surface coils. We will replace the existing bypass humidifier with a brand new bypass humidifier. Due to the tight space constraints in the corner, we will retain a standard 1-inch filter rack configuration, as there is not enough clearance to adapt
Estimate Summary: Complete replacement of the existing failed heating and cooling system with our Lennox Signature Series. This system features fully Variable-Speed technology for both heating and cooling, providing the quietest operation and the most precise temperature and humidity control available.

Heating & Cooling Equipment: We will remove the existing furnace and AC and install the Lennox Signature Variable-Speed Gas Furnace paired with the matching Variable-Speed Air Conditioner. The system will be controlled by the new Lennox S40 Smart Thermostat, which acts as the communication hub for the equipment.

Indoor Air Quality & Accessories: We will install the Lennox PureAir Carbon Catalyst UV light system to actively clean the air and surface coils. We will replace the existing bypass humidifier with a brand new bypass humidifier. Due to the tight space constraints in the corner, we will retain a standard 1-inch filter rack configuration, as there is not enough clearance to adapt
Adam P.
Adam P. Checked in
Estimate Summary: Complete replacement of the existing failed heating and cooling system with our Lennox Signature Series. This system features fully Variable-Speed technology for both heating and cooling, providing the quietest operation and the most precise temperature and humidity control available. Heating & Cooling Equipment: We will remove the existing furnace and AC and install the Lennox Signature Variable-Speed Gas Furnace paired with the matching Variable-Speed Air Conditioner. The system will be controlled by the new Lennox S40 Smart Thermostat, which acts as the communication hub for the equipment. Indoor Air Quality & Accessories: We will install the Lennox PureAir Carbon Catalyst UV light system to actively clean the air and surface coils. We will replace the existing bypass humidifier with a brand new bypass humidifier. Due to the tight space constraints in the corner, we will retain a standard 1-inch filter rack configuration, as there is not enough clearance to adapt
Nashua, NH 03064
Review
Excellent!!!
Kathleen - Merrimack, NH 03054
Adam P.
Adam P. Checked in
Client was complaining of clogged toilet. I arrived client was snaking drain. I observed and took note of plumbing. Last couple years client has had issues. Plumbing pipes need to be pitched more for better flow. Advised client of how to resolve issue. Plumbing was not clogged when I was there.
Merrimack, NH 03054
Adam P.
Adam P. Checked in
Customer called and complained of fuel smell and haze in house. Smoke and carbon monoxide detectors did not detect anything. Ran burner and did tests,numbers and smoke levelsand draft matched previous numbers. Took apart smoke pipe. No signs of soot in boiler or smoke pipe. Noticed pieces of chimney tile in flue,mentioned to homeowner to get chimney inspected. I believe that she must of had a downdraft that brought in smell and haze.
Merrimack, NH 03054
Replacement of the existing unit and installation of a new Sterling Ensemble tub & shower unit.

The new unit will be a right-hand drain configuration and will include a standard Moen Chateau polished chrome valve with a standard shower head and tub spout. For enhanced functionality, the shower arm will feature a Kohler Awaken transfer valve connected to a Kohler Awaken handheld shower with a 60" hose, all in matching polished chrome finish.

Note: The interior water height of the new tub is 11", with the top of the tub sitting at 16".

The existing waste and supply lines will be reconnected at the point-of-use. This installation includes all necessary plumbing materials and labor, but any carpentry finish work is explicitly not included.
Replacement of the existing unit and installation of a new Sterling Ensemble tub & shower unit.

The new unit will be a right-hand drain configuration and will include a standard Moen Chateau polished chrome valve with a standard shower head and tub spout. For enhanced functionality, the shower arm will feature a Kohler Awaken transfer valve connected to a Kohler Awaken handheld shower with a 60" hose, all in matching polished chrome finish.

Note: The interior water height of the new tub is 11", with the top of the tub sitting at 16".

The existing waste and supply lines will be reconnected at the point-of-use. This installation includes all necessary plumbing materials and labor, but any carpentry finish work is explicitly not included.
Adam P.
Adam P. Checked in
Replacement of the existing unit and installation of a new Sterling Ensemble tub & shower unit. The new unit will be a right-hand drain configuration and will include a standard Moen Chateau polished chrome valve with a standard shower head and tub spout. For enhanced functionality, the shower arm will feature a Kohler Awaken transfer valve connected to a Kohler Awaken handheld shower with a 60" hose, all in matching polished chrome finish. Note: The interior water height of the new tub is 11", with the top of the tub sitting at 16". The existing waste and supply lines will be reconnected at the point-of-use. This installation includes all necessary plumbing materials and labor, but any carpentry finish work is explicitly not included.
Concord, NH 03301
Replaced water heater
Replaced water heater
Adam P.
Adam P. Checked in
Replaced water heater
Manchester, NH 03109
Nashua, NH - Replace existing Rinnai due to failure of Servo but also due to delay in waiting for parts needed. 

New unit will be installed as a direct replacement. We will replace the CSST gas line with rigid black iron piping to bring up to our standard for a safe installation.
Adam P.
Adam P. Checked in
Replace existing Rinnai due to failure of Servo but also due to delay in waiting for parts needed. New unit will be installed as a direct replacement. We will replace the CSST gas line with rigid black iron piping to bring up to our standard for a safe installation.
Nashua, NH 03064
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
Review
Adam let me know 1/2 in advance of arrival. Showed up on time. Explained in simple to understand terminology what was being done and any system restrictions during the install. He completely answered any follow-up questions I had. He was courteous to my wife with any questions she had. The install results are professional and immaculate. The entire staff at GSMS was courteous and highly professional. I highly recommend GSMS and Adam for any HVAC work.
Donald - Barrington, NH 03825
Review
GSMS did an excellent job with our mini split! We are very happy with their work!
Bernadette - Newmarket, NH 03857
Review
Adam and his associates did a wonderful job . They were knowledgeable, professional and extremely efficient in completing the work . Adam took the time to review how the system operates making reference to the Owners Manual . He was sure to recommend calling if I had any follow up questions. I will definitely recommend your Company based on the work that Adam and the others performed.
Bill - Weare, NH 03281
Review
Very professional in all respects.
BJ - Merrimack, NH 03054
Trusted Quality & Service