Sonoma County
Heat Pump, HVAC & Water Heater Services in Windsor, CA
Heat pumps, water heaters, AC, furnaces, and mini splits for Windsor homes. Same-day water heater replacement when our schedule allows.
Green Core Heating & Air installs and services heat pumps, water heaters, air conditioning, furnaces, and ductless mini splits for homes in Windsor, CA, from neighborhoods built in the 1980s and '90s to brand-new developments. Windsor sits at the north end of the Santa Rosa Plain, where summer afternoons regularly climb into the 90s and winter nights dip into the 30s, so your system has to handle real heat and real cold.
Whether you're catching a summer concert on the Windsor Town Green or heading out for a hike at Shiloh Ranch Regional Park, you should come home to a house that feels comfortable. If upstairs rooms bake in July or your system runs nonstop, that's usually a design problem we can fix.
Landmarks & neighborhoods we serve
- Windsor Town Green
- Shiloh Ranch Regional Park
- Keiser Park
- Esposti Park
- Old Redwood Highway
Serving Windsor
Designed for Windsor Homes
A lot of Windsor's neighborhoods were built from the 1980s through the 2000s, and many of those homes still have their original builder-grade furnace and AC. After 20 to 30 years, that equipment is near the end of its life, and the attic ductwork that came with it often leaks cool air straight into the hottest part of the house.
When we replace a system in Windsor, we start with a load calculation and a duct check, not just the size of the old unit. Right-sizing the equipment and sealing the ducts is what fixes hot upstairs bedrooms and high summer bills. After recent wildfire seasons, many Windsor homeowners also ask for better filtration for smoky days, and we can build that in.
Serving Windsor
Heat Pumps and Water Heaters in Windsor
Windsor's hot summers make a heat pump an easy upgrade: one all-electric system gives you efficient cooling in July and heating in January, and it replaces both an old furnace and an old AC. For hot water, a heat pump water heater is the lowest-cost option to run, and gas and electric tank replacements start at $2,850, with same-day replacement when our schedule allows.
We pull permits through the Town of Windsor and handle the inspections, so you don't have to coordinate any of it.
Serving Windsor
Why We Love Windsor
Windsor has the feel of a small town with a real community center, from the Town Green to the farmers market, and it's a short drive from wine country and the Russian River. Homeowners here care about doing things right, and that's the kind of work we like to do.
Serving Windsor
Water heaters in Windsor
Need a new water heater in Windsor? 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 Windsor 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.
Windsor garages get warm in the summer, which actually helps a heat pump water heater run more efficiently.
Our services
HVAC services in Windsor
Green Core provides the following services throughout Windsor and surrounding Sonoma County areas:
Heating & cooling in Windsor
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 Windsor
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
Windsor FAQ
Questions from Windsor homeowners
Do you install heat pumps in Windsor, CA?
Yes. Green Core designs and installs heat pump systems for Windsor homes, including ducted heat pumps, ductless mini splits, and Harvest Thermal systems. Every install starts with a load calculation so the system is sized for Windsor's hot summers and cold winter nights.
Are there rebates for heat pumps in Windsor?
Most Windsor homes get their electricity through Sonoma Clean Power, with PG&E handling delivery. Depending on current funding, you may qualify for rebates through TECH Clean California, Sonoma Clean Power, or BayREN. We check what's available and file the paperwork for you. The federal 25C tax credit ended for systems installed after December 31, 2025.
Do I need a permit to replace my HVAC system or water heater in Windsor?
Yes. HVAC and water heater replacements need a permit from the Town of Windsor. We pull the permit and schedule the inspection as part of the job.
Can you replace a water heater the same day in Windsor?
Often, yes. We offer same-day water heater replacement when our schedule allows, and gas and electric tank installs start at $2,850. Call (707) 988-5858 to check today's availability.
Will a heat pump keep my Windsor home cool in the summer?
Yes, when it's sized correctly. Modern heat pumps cool just as well as a central air conditioner. The key is a proper load calculation and tight ductwork, which is how we design every system.
Schedule HVAC service in Windsor.
Local crews, fast response, honest pricing. Usually same-day callbacks.