Sonoma County
Heat Pump, HVAC & Water Heater Services in Sonoma, CA
Heat pumps, water heaters, AC, furnaces, and mini splits for Sonoma homes. Same-day water heater replacement when our schedule allows.
Green Core Heating & Air installs and services heat pumps, ductless mini splits, water heaters, air conditioning, and furnaces for homes in Sonoma, CA, and the surrounding Sonoma Valley. Valley summers get hot, nights cool off fast, and many homes here are older, so comfort comes down to a system designed for the house you actually have.
Whether you're spending a Saturday around the Sonoma Plaza or walking the Overlook Trail above town, your home should be a comfortable place to come back to. Rooms that never cool down, drafty older floors, or a furnace that struggles on cold mornings are all things we fix every week.
Landmarks & neighborhoods we serve
- Sonoma Plaza
- Mission San Francisco Solano
- Sonoma Overlook Trail
- Montini Preserve
- Maxwell Farms Regional Park
- Boyes Hot Springs
Serving Sonoma
Designed for Sonoma Homes
Sonoma has everything from historic homes near the Plaza to ranch houses and newer builds out toward the Springs. Older homes often have little or no ductwork, cramped crawlspaces, or a single wall furnace doing all the work. For those houses, a ductless mini split system can add efficient heating and cooling room by room without tearing into walls.
Homes with existing ducts usually do best with a ducted heat pump, sized with a proper load calculation and paired with duct repairs where needed. That's how you get even temperatures through hot valley afternoons without oversized equipment.
Serving Sonoma
Rebates and Permits in Sonoma
Most homes in Sonoma get their electricity through Sonoma Clean Power, which can mean rebates for heat pumps and heat pump water heaters on top of TECH Clean California and BayREN programs, depending on current funding. We check what you qualify for and file the paperwork.
Inside city limits, permits go through the City of Sonoma. In unincorporated areas like Boyes Hot Springs, El Verano, and Glen Ellen, they go through Permit Sonoma. We handle either one.
Serving Sonoma
Why We Love Sonoma
Sonoma blends history, small-town character, and some of the best views in wine country. A lot of homes here have been cared for over generations, and we take the same care when we upgrade them.
Serving Sonoma
Water heaters in Sonoma
Need a new water heater in Sonoma? 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 Sonoma homes served by Sonoma Clean Power 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.
In older Sonoma homes, water heaters are often tucked into tight utility closets. We size replacements to fit and bring venting and seismic strapping up to code.
Our services
HVAC services in Sonoma
Green Core provides the following services throughout Sonoma and surrounding Sonoma County areas:
Heating & cooling in Sonoma
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 Sonoma
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
Our work
Recent projects in Sonoma
Real Green Core jobs for homeowners in Sonoma, with photos from the job site.
July 2026
Furnace and AC tune-up with duct repair in Sonoma
We serviced an American Standard furnace and outdoor condenser, tested the electrical components, deep-cleaned the condenser coil, and replaced damaged duct sections with new 12-inch duct to restore airflow.
See the job photos
Sonoma FAQ
Questions from Sonoma homeowners
Can you install a heat pump in an older Sonoma home without ductwork?
Yes. Ductless mini splits are a heat pump designed for homes without ducts. We mount compact indoor units in the rooms that need them and run small refrigerant lines to an outdoor unit, so there's no need to open up walls for ductwork.
Are there heat pump rebates in Sonoma?
Most Sonoma homes are Sonoma Clean Power customers, and depending on current funding, rebates may be available through Sonoma Clean Power, TECH Clean California, or BayREN. We check what applies to your home and handle the paperwork.
Do you serve Glen Ellen, Boyes Hot Springs, and El Verano?
Yes. We work throughout the Sonoma Valley, including the unincorporated areas around the City of Sonoma. Permits there go through Permit Sonoma, and we take care of them.
Do you replace water heaters in Sonoma?
Yes. We install heat pump, tankless, gas, and electric water heaters. Gas and electric tank installs start at $2,850, with same-day replacement when our schedule allows.
Schedule HVAC service in Sonoma.
Local crews, fast response, honest pricing. Usually same-day callbacks.