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Our Services

Heating

Hassler specializes in cost-effective, energy efficient heating services, including furnace...
Cooling

Want to achieve maximize indoor comfort, energy efficiency, and energy bill savings with your...
Maintenance

Preventive maintenance and fast repairs are essential if you want to get the most from your...
Repairs

Just like your car, your heating and AC systems need regular maintenance and repairs to operate...
Replacement

Keep cool all summer, and stay cozy all winter with the best heating and cooling equipment,...
Heat Pump Conversions

Heat pumps are a cost effective way to heat your home in the winter months — and they can cool...

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See What Our Customers Are Saying

I'm writing to thank you for your work in providing air conditioning for my house. Given the particular structure and setting of this modernist, flat-roofed house, with its open rooms and glass walls, it was unclear what type of system would work here. You guided me to the ductless, split system... Read More

Marilyn B., Kensington CA
Hassler Heating went above and beyond customer service! My AC unit started smoking and I called to make an appointment and they were able to fit me into their schedule that day! Derrick Easton was the technician and he arrives 15 minutes before the appointment and was professional and even... Read More

Emily V., Concord, CA
The condenser unit at our house went out the Sunday before Labor Day, just before a week of 100 degree days. I called Hassler and was surprised to have someone pick up the phone, and happy to be able to schedule a next day appointment. Mike came today, was right on time, and quickly... Read More

Scott L., Lafayette, CA
The company provided great service. Tony Falsette serviced my air conditioner today. He quickly identified the problem, took time to explain it, answered my questions and got everything in working order under 2 hours that even included a trip back to El Cerrito to get the right part. He... Read More

Veronica A., Hercules, CA
Chris just came out and inspected a furnace and ducting for me at a property that clients of mine are purchasing in El Cerrito. He was very knowledgable and was sure to take the time to answer all of my questions thoroughly. I would definitely use Hassler again based on the service he... Read More

Jeffery S., Walnut Creek, CA
"My wife and I moved to the area buying a townhouse in 2010, with a twenty-one year old gas furnace. Each heating season we had problems with the furnace, with a couple of different HVAC companies replacing parts, but with the problem soon recurring. In February 2014 we had Hassler work on... Read More

Tom R., San Rafael
"We've had our central heating die twice since 1991 - and of course, both times it was right when the Bay Area got socked by those rare two-week Alaskan freezes! Hassler was booked solid, not surprisingly, but Jackie gave us an appt six days out, so we huddled near portable heaters and... Read More

Jean K., Oakland, CA
"Great service. After installing the system two years ago, they called me to setup a follow-up maintenance check. Chris is a very professional and courteous person and great to work with."
... Read More

Albert W., Oakland, CA
I chose Hassler HVAC after talking to a few HVAC
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Sean M., Oakland, CA

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"Hassler HVAC: quick diagnosis and a quick fix. Derrick is "The Man". Quick diagnosis (less than 20 minutes) of a problem that turned out to be simple, but not at all obvious. Quick repair (less than 40 minutes).
Polite, courteous. Clear explanations of the problems and the... Read More

Bertram T., Oakland, CA

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"The only good thing about all that rust in my water was calling Hassler. I got a new tank for a decent price and great customer service. The install took longer than expected because whoever installed the last one did some very odd things. But Hassler stuck to their estimate.
... Read More