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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 31 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

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
Adam P.
Adam P. Checked in
Scope of Work: Replacement of the existing heating and cooling system with a new high-efficiency Lennox Heat Pump system. Indoor Equipment & Installation: Furnace & Coil: Installation of a new Lennox furnace and matching heat pump evaporator coil. Reuse of Existing Components: We will retain and re-connect to the existing return base and the existing AirBear filtration cabinet, as these are in good condition. Venting: The existing concentric vent kit will be removed and replaced with a new, optimized venting configuration routed to the exterior of the home. Lineset: A completely new refrigerant lineset will be run from the indoor unit to the outdoor unit location. Zoning & Controls (Smart Upgrade): Lennox Smart Zoning: The system will retain its current two-zone design but will be upgraded to the Lennox Smart Zoning System. This includes the installation of two new zone dampers, which allow for precise airflow modulation and significantly improved temperature control compared to
Bedford, NH 03110
Water servo valve not functioning. Water from vent pipe dripping over controls. Water servo needs to be replaced. Vent pipe needs to be redone so it is pitching outwards. There are signs of corrosion from vent pipe not installed properly. Unit might have future issues or may not depending on rate of corrosion.
Water servo valve not functioning. Water from vent pipe dripping over controls. Water servo needs to be replaced. Vent pipe needs to be redone so it is pitching outwards. There are signs of corrosion from vent pipe not installed properly. Unit might have future issues or may not depending on rate of corrosion.
Adam P.
Adam P. Checked in
Water servo valve not functioning. Water from vent pipe dripping over controls. Water servo needs to be replaced. Vent pipe needs to be redone so it is pitching outwards. There are signs of corrosion from vent pipe not installed properly. Unit might have future issues or may not depending on rate of corrosion.
Nashua, NH 03064
Call was for carbon monoxide. The fire department was called in. They were measuring 130 to 150 parts per million CO. Pulled a coil out could not find crack and heat exchanger, did efficiency test found levels inside vent exhaust at 30 ppm gas pressure was at 3.5 inches. Ran furnace for a while with my carbon monoxide detector and dock and did not register any CL, thinking there’s a crack in the heat exchanger that opens up when it gets really hot. Tested vent pipes found leaks and vent pipes will have to run a new vent disconnected electrical and gas and condemned furnace not to be used.
Call was for carbon monoxide. The fire department was called in. They were measuring 130 to 150 parts per million CO. Pulled a coil out could not find crack and heat exchanger, did efficiency test found levels inside vent exhaust at 30 ppm gas pressure was at 3.5 inches. Ran furnace for a while with my carbon monoxide detector and dock and did not register any CL, thinking there’s a crack in the heat exchanger that opens up when it gets really hot. Tested vent pipes found leaks and vent pipes will have to run a new vent disconnected electrical and gas and condemned furnace not to be used.
Adam P.
Adam P. Checked in
Call was for carbon monoxide. The fire department was called in. They were measuring 130 to 150 parts per million CO. Pulled a coil out could not find crack and heat exchanger, did efficiency test found levels inside vent exhaust at 30 ppm gas pressure was at 3.5 inches. Ran furnace for a while with my carbon monoxide detector and dock and did not register any CL, thinking there’s a crack in the heat exchanger that opens up when it gets really hot. Tested vent pipes found leaks and vent pipes will have to run a new vent disconnected electrical and gas and condemned furnace not to be used.
Nashua, NH 03064
Not hot water. Code 65. Found water dripping from unit. Noticed water dripping from combustion blower. Opened up cold water inlet screen. Screen was plugged , also a piece of rubber gasket inside. Replaced screen assembly with new one. Ran hot water on tub for 5 minutes,no codes. Looked into water dripping from combustion blower, I believe with the extreme cold air unit is bringing in and lack of correct pitch outward is causing issue. Maybe look into redoing vent to prevent future issues. Or maybe lifting unit up an inch. Also a flush for unit is needed
Not hot water. Code 65. Found water dripping from unit. Noticed water dripping from combustion blower. Opened up cold water inlet screen. Screen was plugged , also a piece of rubber gasket inside. Replaced screen assembly with new one. Ran hot water on tub for 5 minutes,no codes. Looked into water dripping from combustion blower, I believe with the extreme cold air unit is bringing in and lack of correct pitch outward is causing issue. Maybe look into redoing vent to prevent future issues. Or maybe lifting unit up an inch. Also a flush for unit is needed
Adam P.
Adam P. Checked in
Not hot water. Code 65. Found water dripping from unit. Noticed water dripping from combustion blower. Opened up cold water inlet screen. Screen was plugged , also a piece of rubber gasket inside. Replaced screen assembly with new one. Ran hot water on tub for 5 minutes,no codes. Looked into water dripping from combustion blower, I believe with the extreme cold air unit is bringing in and lack of correct pitch outward is causing issue. Maybe look into redoing vent to prevent future issues. Or maybe lifting unit up an inch. Also a flush for unit is needed
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
Adam P.
Adam P. Checked in
Intermittent problem with furnace. Checked in incoming gas pressure at 5.9 inches, manifold pressure was 3.5 inches. Check the pressure switch rollout switch. Look for loose wire connections check air filter. Check condensate tube turn furnace on and off multiple times was not able to replicate problem.
Merrimack, NH 03054
Adam P.
Adam P. Checked in
No heat. Oil pressure no spark. Went through wires on primary checked connections. Put back together,
Merrimack, NH 03054
Scope of Work:
Replacement of the existing oil-fired boiler with a new, reliable Cast Iron Oil Boiler featuring an internal tankless coil for domestic hot water.

Hydronic Piping Upgrade (GSMS Standard):

Circulator Conversion: We will remove the existing system of zone valves and a single pump. The system will be repiped to feature dedicated circulator pumps for each of the two heating zones. This upgrade provides better flow, redundancy, and reliability.

Near-Boiler Piping: Installation includes our complete piping package: new isolation flanges, high-performance air eliminator, expansion tank, automatic feed valve, and backflow preventer.

Domestic Hot Water:

The new boiler will include an internal Tankless Coil to generate domestic hot water, maintaining the same style of operation as the current system.

Venting & burner:

A new high-efficiency oil burner will be set up and calibrated.

The boiler will be connected to the existing chimney flue.
Scope of Work:
Replacement of the existing oil-fired boiler with a new, reliable Cast Iron Oil Boiler featuring an internal tankless coil for domestic hot water.

Hydronic Piping Upgrade (GSMS Standard):

Circulator Conversion: We will remove the existing system of zone valves and a single pump. The system will be repiped to feature dedicated circulator pumps for each of the two heating zones. This upgrade provides better flow, redundancy, and reliability.

Near-Boiler Piping: Installation includes our complete piping package: new isolation flanges, high-performance air eliminator, expansion tank, automatic feed valve, and backflow preventer.

Domestic Hot Water:

The new boiler will include an internal Tankless Coil to generate domestic hot water, maintaining the same style of operation as the current system.

Venting & burner:

A new high-efficiency oil burner will be set up and calibrated.

The boiler will be connected to the existing chimney flue.
Adam P.
Adam P. Checked in
Scope of Work: Replacement of the existing oil-fired boiler with a new, reliable Cast Iron Oil Boiler featuring an internal tankless coil for domestic hot water. Hydronic Piping Upgrade (GSMS Standard): Circulator Conversion: We will remove the existing system of zone valves and a single pump. The system will be repiped to feature dedicated circulator pumps for each of the two heating zones. This upgrade provides better flow, redundancy, and reliability. Near-Boiler Piping: Installation includes our complete piping package: new isolation flanges, high-performance air eliminator, expansion tank, automatic feed valve, and backflow preventer. Domestic Hot Water: The new boiler will include an internal Tankless Coil to generate domestic hot water, maintaining the same style of operation as the current system. Venting & burner: A new high-efficiency oil burner will be set up and calibrated. The boiler will be connected to the existing chimney flue.
Merrimack, NH 03054
Bedford, NH - Installation of a new high-performance steam humidifier for the first-floor HVAC system.

Scope of Work: The existing bypass humidifier will be disconnected, removed, and the ductwork opening will be properly patched. The new steam unit will be mounted on the wall near the furnace, with tubing routed to the steam dispersion tube inserted into the supply duct.

A dedicated electrical circuit will be installed from the electrical panel to the humidifier location to power the steam generator.

Controls: The steam unit will be wired directly to the existing Lennox S40 smart thermostat. This allows for precise, integrated control of humidity levels through the main system interface.

Performance Note: While this unit is installed on the first-floor system, humidity naturally migrates. Therefore, the second floor should receive incidental humidification, although this is not a dedicated solution for that specific zone.
Adam P.
Adam P. Checked in
Installation of a new high-performance steam humidifier for the first-floor HVAC system. Scope of Work: The existing bypass humidifier will be disconnected, removed, and the ductwork opening will be properly patched. The new steam unit will be mounted on the wall near the furnace, with tubing routed to the steam dispersion tube inserted into the supply duct. A dedicated electrical circuit will be installed from the electrical panel to the humidifier location to power the steam generator. Controls: The steam unit will be wired directly to the existing Lennox S40 smart thermostat. This allows for precise, integrated control of humidity levels through the main system interface. Performance Note: While this unit is installed on the first-floor system, humidity naturally migrates. Therefore, the second floor should receive incidental humidification, although this is not a dedicated solution for that specific zone.
Bedford, NH 03110
Adam P.
Adam P. Checked in
Cut 2x4 to reduce vibration
Auburn, NH 03032
Adam P.
Adam P. Checked in
Installation of a new oil furnace to replace the existing system. Ductwork & Airflow Improvements: Return Air Upgrade: We will completely redo the return drop and install a new, larger 24" x 10" floor register. This is critical to ensure the new furnace has adequate return air "to breathe" and operate efficiently. Airflow Adjustment: Depending on the final airflow measurements, we may need to open up basement supply runs that were previously closed off or install an additional register to guarantee proper static pressure and comfort. Filtration: A new AirBear filtration cabinet will be installed to improve air quality and protect the new equipment. Oil & Venting Connections: A new coated oil line will be installed running from the existing Tigerloop to the existing oil tank. The existing 6" venting will be adapted to connect to the new furnace. Electrical & Code Compliance: Our electrical team will install a dedicated emergency shut-off switch at the top of the stairs, bringing
Loudon, NH 03307
Pelham, NH - Looked at first floor toilet. Leak appears to be from water softener drain line from outside. Upstairs toilet and supply valve needs to be replaced.
Adam P.
Adam P. Checked in
Looked at first floor toilet. Leak appears to be from water softener drain line from outside. Upstairs toilet and supply valve needs to be replaced.
Pelham, NH 03076
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
Review
Great work—explained work well.
Francis - Goffstown, NH 03045
Review
From my first meeting with Zak to the install with Adam, everything went exceptionally well! Very professional, great communication, and a competitive price. I highly recommend GSMS if you’re looking for a ductless mini-split installation or any other heating or plumbing needs for that matter. Thanks guys for the great job!
Lou - Hooksett, NH 03106
Response from GSMS Air•Heating•Plumbing:

Thank you so much for this 5-star review. We really appreciate you being a customer and helping to share the word about us. We’re here for you anytime.

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