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Appalachian Green Builders LLC — operating as AGB Geothermal Heating & Air Company — is a veteran-owned geothermal heating and cooling specialist based in Bethlehem, New Hampshire. Owner Peter Duguay is an Honorably Discharged Combat Veteran of the U.S. Army with nearly 15 years serving the White Mountains region and surrounding New Hampshire and Vermont communities. The company holds IGSHPA membership (#17867-0708), BPI Building Analyst Professional certification (#5032735), EPA certification (#P42A4FE58CFC532F1), and ACCA Quality Assured recognition for Energy Star qualified home installations. Specializing in WaterFurnace geothermal systems, AGB installs closed-loop and open-loop ground heat exchangers and also offers the Well-Connect geothermal system in both professional and DIY packages. Conventional heating, air conditioning repair, and high-efficiency water heater services complement the geothermal offerings. Industry-leading WaterFurnace warranties and financing are available.
Verified active operator per https://nhlovesgeothermal.com/ + https://nhlovesgeothermal.com/about-us (Bundle 5 audit 2026-05-29)
Veteran-owned installer specializing in WaterFurnace geothermal systems with industry-leading warranties, serving Bethlehem and the White Mountains region of New England.
Geothermal heat pump installations in New Hampshire require specific permits and compliance with state regulations regarding well drilling, loop installation, and refrigerant handling. Contact your local building department for specific requirements in your area.
How much more efficient is a geothermal system than conventional HVAC in Bethlehem?add
Geothermal systems are four to five times more efficient than traditional HVAC systems. They provide four to five units of energy for every one unit used to power the system, and are over five times more efficient in heating and more than twice as efficient in cooling as the most efficient ordinary systems.
What geothermal loop types does Appalachian Green Builders install in Bethlehem?add
Appalachian Green Builders specializes in both closed-loop and open-loop ground heat exchange systems, and also offers Well-Connect geothermal systems in both professional installation and DIY packages.
Can a geothermal system both heat and cool my Bethlehem home?add
Yes. Geothermal heat pumps are versatile heating and cooling systems in one. With a simple switch on your thermostat, you can change from heating mode (transferring heat from the earth into your home) to cooling mode (transferring heat from your home to the earth).
What brands does Appalachian Green Builders service?add
Appalachian Green Builders specializes in WaterFurnace geothermal systems and provides installation, maintenance, and service for all major geothermal brands.
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If you need to reach Appalachian Green Builders LLC directly: (603) 728-8166
Geothermal heat pump installations in New Hampshire may require drilling permits, environmental site assessments, and compliance with local well and thermal energy regulations. Requirements vary by jurisdiction and system type (vertical, horizontal, open-loop). Contact your local municipality, state energy office, or a licensed geothermal installer for specific permitting requirements in your area.
