AGB Geothermal installation team at work

Our Services

Geothermal Solutions for
Every NH & VT Home

From WaterFurnace installations to our innovative Well-Connect Hybrid system, AGB Geothermal has the right solution for your home — and nearly 20 years of experience to back it up.

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WaterFurnace Geothermal

Industry-Leading Geothermal Systems

AGB Geothermal installs WaterFurnace geothermal heat pumps — the gold standard in residential geothermal. These systems use a ground loop buried on your property to exchange heat with the earth, delivering up to 400% efficiency and cutting your heating and cooling bills by up to 70%.

Vertical loop systems — ideal for smaller lots
Horizontal loop systems — great for larger properties
Heating, cooling, and hot water from one system
Up to 400% efficiency (COP 4.0+)
25-year equipment lifespan

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Well-Connect hybrid geothermal system using existing water well

Well-Connect Hybrid System

Geothermal Using Your Existing Well

Our innovative Well-Connect Hybrid system is designed specifically for NH & VT homeowners who already have a drilled water well. Instead of installing a new ground loop, Well-Connect uses your existing well as the heat exchange source — dramatically reducing installation cost and disruption to your property.

Uses your existing drilled water well
No new ground loop excavation needed
Lower upfront installation cost
Same efficiency as conventional geothermal
Ideal for properties with limited yard space
Pairs with your existing heating system

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Geothermal system maintenance and service

Maintenance & Service

Keep Your System Running at Peak Performance

A geothermal system is one of the most reliable heating and cooling solutions available — but like any mechanical system, it benefits from regular professional maintenance. AGB Geothermal offers comprehensive service plans to keep your system running efficiently for decades.

Annual system inspections and tune-ups
Filter replacements and fluid checks
Performance diagnostics and efficiency testing
Emergency service for existing customers
Service for all major geothermal brands
Maintenance plans available

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Why Geothermal

The Numbers Speak for Themselves

Up to 70% Energy Savings

Geothermal is the most efficient heating and cooling technology available — period.

Nearly 20 Years of Experience

AGB Geothermal has been installing systems across NH & VT since 2007.

Year-Round Comfort

One system handles heating, cooling, and hot water — no more juggling fuel prices.

Rebates & Financing

We guide every customer through available incentives to maximize your investment.

Not Sure Which System
Is Right for You?

Every home is different. Our team will assess your property, your current heating system, and your budget — and recommend the best path to geothermal for your specific situation. No pressure, no obligation.