Marin County
Heat Pump, HVAC & Water Heater Services in Mill Valley, CA
Heat pumps, water heaters, AC, furnaces, and mini splits for Mill Valley 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 Mill Valley, CA, including the hillside and wooded homes at the foot of Mount Tamalpais. Unlike inland areas, the climate here is heavily influenced by coastal fog, cooler temperatures, and dense tree coverage. That means HVAC systems aren't about extreme heating or cooling — they're about consistency, moisture control, and quiet, efficient operation.
Whether you're spending the morning hiking Mount Tamalpais, walking through Downtown Mill Valley, or enjoying the surrounding redwoods, you want to come home to a space that feels warm, dry, and comfortable. If your home feels damp, uneven, or difficult to regulate, it's often a sign your system wasn't designed for these conditions.
Landmarks & neighborhoods we serve
- Downtown Mill Valley
- Mount Tamalpais
- Old Mill Park
- Muir Woods
Serving Mill Valley
Designed for Mill Valley Homes
Mill Valley homes are anything but standard. From hillside properties to architecturally unique builds tucked into wooded areas, every home presents a different challenge. Many properties here have limited or unconventional ductwork — or none at all — which makes traditional HVAC systems less effective.
At Green Core Heating & Air, we provide heat pump systems, mini split (ductless) installations, air conditioning solutions, furnace services, and ductwork upgrades tailored to these environments. We often design systems that prioritize flexibility and efficiency, such as ductless mini splits or properly sized heat pumps that deliver consistent comfort without overloading the space.
Instead of forcing a system into your home, we design around it — ensuring everything works together to provide reliable performance.
Serving Mill Valley
Built for Comfort, Efficiency, and Moisture Control
One of the biggest challenges in Mill Valley isn't temperature — it's moisture. The coastal air and frequent fog can leave homes feeling damp or uncomfortable if airflow and ventilation aren't properly addressed. That's why we focus on systems that improve not just heating and cooling, but overall indoor air quality.
After a day outdoors or time spent in the cooler coastal air, you should be able to come home to a space that feels balanced and comfortable. Whether you need heat pump installation, ductless systems, furnace service, or airflow improvements, we design solutions that keep your home efficient, dry, and comfortable year-round.
Serving Mill Valley
Why We Love Mill Valley
Mill Valley has a character all its own. The combination of natural beauty, quiet neighborhoods, and unique homes makes it one of the most distinctive places to live in Marin County. From the trails of Mount Tam to the charm of downtown, it's a place where people truly value their environment — and their homes reflect that.
We enjoy working in Mill Valley because no two homes are the same. Each project requires a thoughtful approach, and it's rewarding to help homeowners improve comfort while preserving the integrity and design of their space.
Serving Mill Valley
Water heaters in Mill Valley
Need a new water heater in Mill Valley? 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 Mill Valley 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.
Many Mill Valley homes have the water heater in a tight closet or under-house space, where a compact tankless unit or a SANCO2 heat pump with its unit outside can free up room.
Our services
HVAC services in Mill Valley
Green Core provides the following services throughout Mill Valley and surrounding Marin County areas:
Heating & cooling in Mill Valley
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 uses one all-electric heat pump for heating, hot water, and cooling, with smart controls that shift energy use to cheaper hours.
Learn more
Water heating in Mill Valley
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.
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Mill Valley FAQ
Questions from Mill Valley homeowners
Do you install heat pumps in Mill Valley?
Yes. Green Core designs and installs heat pumps for Mill Valley 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 your home.
Are there heat pump rebates in Mill Valley?
Most Mill Valley homes get their electricity through MCE, with PG&E handling delivery. Depending on current funding, heat pumps and heat pump water heaters may qualify for rebates through MCE, TECH Clean California, or BayREN. We check what's available and file the paperwork. The federal 25C tax credit ended for systems installed after December 31, 2025.
Do you replace water heaters in Mill Valley?
Yes. We install heat pump, tankless, gas, and electric water heaters in Mill Valley. Gas and electric tank installs start at $2,850, and we offer same-day replacement when our schedule allows.
Schedule HVAC service in Mill Valley.
Local crews, fast response, honest pricing. Usually same-day callbacks.