Marin County
Heat Pump, HVAC & Water Heater Services in Fairfax, CA
Heat pumps, water heaters, AC, furnaces, and mini splits for Fairfax homes. Same-day water heater replacement when our schedule allows.
Green Core Heating & Air installs and services heat pumps, ductless mini splits, heat pump water heaters, furnaces, and air conditioning for homes in Fairfax, CA, from cottages near downtown to canyon homes off Bolinas Road. Fairfax homes tend to be smaller, older, and tucked into shaded canyons, which makes efficient, all-electric heating and cooling a natural fit.
Whether you're grabbing coffee on Bolinas Road, heading to a show at the Fairfax Pavilion, or starting a ride into Cascade Canyon, your home should feel warm on damp winter mornings and comfortable on warm afternoons. Cold, shaded rooms and old wall heaters are the issues we see most often here.
Landmarks & neighborhoods we serve
- Downtown Fairfax
- Bolinas Road
- Fairfax Pavilion
- Deer Park
- Cascade Canyon Open Space
Serving Fairfax
Designed for Fairfax Homes
Many Fairfax homes are cottages, cabins, and mid-century houses under redwoods and oaks, along with a growing number of ADUs. Shade and creek-side moisture keep homes cool and damp in winter, and older heating like wall furnaces or baseboard heaters can't keep up efficiently.
Ductless mini splits work especially well here. They heat and cool individual rooms or an ADU quietly and efficiently, with no ductwork needed. For homes with existing ducts, a right-sized ducted heat pump is usually the better fit. Either way, we check your electrical panel first, since smaller older panels are common.
Serving Fairfax
Going All-Electric in Fairfax
Fairfax has a strong sustainability community, and many homeowners here want to move off gas completely. A heat pump for heating and cooling, plus a heat pump water heater, covers the biggest gas uses in most homes. Harvest Thermal can combine both into one system.
Most Fairfax homes get electricity through MCE, and depending on current funding, rebates may be available through MCE, TECH Clean California, or BayREN. We check what you qualify for, handle the paperwork, and pull permits through the Town of Fairfax.
Serving Fairfax
Why We Love Fairfax
Fairfax is creative, outdoorsy, and proud of its small-town character, with trails starting right from downtown. Helping homeowners here make thoughtful, efficient upgrades is a great fit for how we like to work.
Serving Fairfax
Water heaters in Fairfax
Need a new water heater in Fairfax? Green Core installs and replaces heat pump, tankless, gas, and electric water heaters, with same-day replacement when our schedule allows. Gas and electric tank installs start at $2,850.
For the lowest running cost, a SANCO2 or GE GeoSpring heat pump water heater is hard to beat, and Fairfax homes served by MCE may qualify for rebates on top of TECH Clean California and BayREN programs, depending on current funding. Want endless hot water instead? We install Navien tankless units, sized to your household.
For Fairfax homeowners moving off gas, a heat pump water heater is usually the next step after a heat pump, and we check your panel so both can be planned together.
Our services
HVAC services in Fairfax
Green Core provides the following services throughout Fairfax and surrounding Marin County areas:
Heating & cooling in Fairfax
Heat Pumps
Heat pumps are one of the most energy-efficient ways to heat and cool your home — reliable year-round comfort in a single, all-electric system.
Learn moreAir Conditioning
A properly designed AC system keeps your home cool and efficient — professional installation, repair, and replacement tailored to your home.
Learn moreFurnaces
Expert furnace installation, repair, and replacement — consistent comfort, improved efficiency, and long-term reliability.
Learn moreMini Splits
Ductless mini splits deliver targeted comfort with zoned control — ideal for additions, garages, older homes, and uneven-temperature spaces.
Learn moreDuct Work
Improve airflow, eliminate inefficiencies, and enhance comfort with ductwork installation, repair, and replacement done properly.
Learn moreHarvest Thermal
Harvest Thermal combines heat pump water heating with smart controls to optimize energy usage — lower operating costs and improved efficiency.
Learn more
Water heating in Fairfax
Water Heaters
Heat pump, tankless, gas, and electric water heater installation, repair, and replacement across Sonoma and Marin. Gas and electric tank installs start at $2,850.
Learn moreHeat Pump Water Heaters
SANCO2 and GE GeoSpring heat pump water heaters installed across Sonoma and Marin. Lower bills, cleaner hot water, and help with rebates.
Learn moreTankless Water Heaters
Navien tankless water heater installation, repair, and yearly maintenance in Sonoma and Marin. Endless hot water in a compact, wall-mounted unit.
Learn moreGas Water Heaters
Gas tank water heater replacement and repair in Sonoma and Marin, with same-day replacement when our schedule allows. Tank installs start at $2,850.
Learn moreElectric Water Heaters
Electric tank water heater replacement and repair in Sonoma and Marin, plus heat pump upgrades that can cut water heating costs.
Learn more
Fairfax FAQ
Questions from Fairfax homeowners
What's the best heating and cooling option for a small Fairfax home or ADU?
Usually a ductless mini split. It heats and cools efficiently without ductwork, runs quietly, and lets you control each room separately. For larger homes with existing ducts, a ducted heat pump is often the better choice.
Can you help us move our Fairfax home off gas?
Yes. Most homes can replace their gas furnace with a heat pump and their gas water heater with a heat pump water heater. Harvest Thermal can handle heating, cooling, and hot water in one system. We check your electrical panel first and plan any upgrades.
Are there heat pump rebates in Fairfax?
Most Fairfax homes are MCE customers. Depending on current funding, rebates may be available through MCE, TECH Clean California, or BayREN. We check what applies and handle the paperwork.
Do I need a permit for a heat pump in Fairfax?
Yes. HVAC and water heater work needs a permit from the Town of Fairfax. We pull the permit and schedule the inspection.
Schedule HVAC service in Fairfax.
Local crews, fast response, honest pricing. Usually same-day callbacks.