We are your trusted
San Francisco Plumbers
Why It Pays to Replace Your Gas Water Heater with a Heat Pump Water Heater
California has always led the way in terms of getting environmentally responsible products and services off the drawing board and into widespread consumer use. Following on the heels of American innovation with electric cars, solar panels, and wind turbines, comes a revolutionary way to heat the water in your home – the Heat Pump Water Heater (HPWH). This isn’t a far-fetched “technology of the future”, it’s available right now with local, state and federal incentives in place to reward early adopters. ACE Plumbing & Rooter is a certified HPWH contractor, we can discuss your options with you and expedite all available rebates and tax breaks.
Does the Heat Pump Water Heater replace gas water heaters?
Yes. It has a slightly larger footprint, so if space is an issue, some models allow the heating appliance and the hot water storage tank to be installed in separate locations. Gas water heaters require methane, gas or propane to create a combustion, which in turn boils the water. HPWH appliances draw in air, compress it, and use that heat to boil the water – it’s like an air conditioner in reverse. With no pilot light to blow out, and no flammable gas to leak, the HPWH is a much safer product to operate. It also lasts longer, typically 13-15 years with proper care and maintenance, versus 8-12 years for a gas unit.
EMERGENCY SERVICES
Having an urgent problem and can’t wait? We will call you.
ACE PLUMBING EMERGENCY
Heat Pump FAQ
Is a Heat Pump Water Heater the same as a standard electric water heater?
Yes and no. Both operate on AC power and use coils to boil the water, but that’s where the similarities end. Most HPWH models are 120v plug-ins, so there is no need for a dedicated breaker on a 240v plug.
Why make the switch to a heat pump electric heater now?
The signs of global warming are getting louder and louder all the time. Unless mankind takes decisive action today, our tomorrow could be dramatically worse than it needs to be. Heat Pump Water Heaters have been around for years, but it’s going to take a major initiative to usher them into the mainstream. We can take a lesson learned from the electric car. The first electric vehicle rolled down the street in the 1800’s, but it wasn’t until 1997 that the Toyota Prius made it mainstream, and even now, more than a quarter century later, they’re still just 1% of the US market. That’s why the Federal Government has partnered with TECH Clean California and the City of San Francisco to incentivise Heat Pump Water Heater installations in 2024. These incentives dramatically lower the cost of installation. Once operational, homeowners will see an immediate reduction in their energy bills. HPWHs operate 3x more efficiently than gas water heaters.
Are heat pump water heater rebates still available in San Francisco in 2026?
Funding availability changes often. As of early 2026, statewide TECH Clean California and HEEHRA single-family rebates have largely been claimed and many regions are on a waitlist, and the federal 25C tax credit for heat pumps expired December 31, 2025. That doesn’t mean homeowners are out of options — PG&E and BayREN often have their own active rebate programs for electrification projects in San Francisco, and funding can reopen as new program cycles are approved. Ace Plumbing & Rooter stays current on what’s actually fundable right now and will check eligibility before recommending an installation path.
Will a heat pump water heater work in a San Francisco basement or garage?
Yes, and in many SF homes that’s the ideal spot. HPWHs pull heat from the surrounding air, so they perform best in a space that stays above roughly 40–45°F year-round and has enough air volume (or ducting) to avoid over-cooling a small closet. Basements, garages, and utility rooms common in SF’s Victorians and Edwardians typically fit well. Tight closets may need a louvered door or ducting kit to bring in enough air.
Does a heat pump water heater make a home colder, especially in older SF houses?
It can have a minor cooling and dehumidifying effect on the room it’s installed in, since it’s extracting heat from the surrounding air, similar to a small air conditioner running nearby. In a closet or unfinished basement this is rarely noticeable. In a small, finished, conditioned space, ducting outside air in and exhaust air out (or installing in a garage instead) avoids any unwanted chill.
How much space and clearance does installation require?
Most residential units need roughly 700–1,000 cubic feet of surrounding air space to operate efficiently, plus manufacturer-specified clearance around the top and sides for airflow. Many San Francisco homes have tight basements or under-stair closets, so Ace evaluates clearance, ducting needs, and condensate drainage as part of every site visit before recommending a model.