Serving Alameda, Contra Costa, Marin Counties and Beyond!

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(510)848-3030

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Hot knob of faucet
Cold knob of furnace

Never Take A Cold Shower Again...

Tankless Hot Water Heater Installation

Find My Home Energy Score!

At Hassler, we believe that helping our customers gain a better understanding as to how energy efficient their homes are is one of the most important parts of our job. This is why we offer an easy to understand Home Energy Score between 1-10 after evaluating the home performance.

Energy Upgrade California

Energy Upgrade California Home Upgrade program helps you make home improvements that can save energy and make your home more comfortable. These whole home rebates, up to $5,500, reward you for addressing your home energy efficiency needs as a system instead of piece by piece.

Our Services

  • Hassler offers services in retrofitting older homes with new and more energy efficient heating...

  • With excessively hot temperatures during the summer months, having an air conditioning system...

  • The Environmental Protection Agency (EPA) says our exposure to air pollution indoors may be 2-5...

  • A home energy assessment is a diagnostic test that evaluates the efficiency of your El Cerrito,...

  • Have you experienced a breakdown with your home heating or AC system and need professional...

  • Like regular oil changes and service checks for your car, your heating and cooling system...

  • Hassler provides installation, repair, and maintenance services for programmable thermostats,...

  • Heating a home's water is among the top household energy burdens, second only to heating and air...

Why Choose Hassler

Hassler is your local, full service, trained and certified home performance experts.

There are many advantages to choosing Hassler as your source for heating and cooling installation and service, including the fact that we are locally owned and operated.

At Hassler, we are offering our customers a furnace and AC safety check for just $99. When you call us to evaluate your furnace, we’ll throw in an AC evaluation at no charge.

  • ....Mike impressed me with his professionalism, attention to detail, and his ability to explain clearly what my options were and how the furnace installation would be performed. His bid price was competitive, too.

    Don K., San Francisco, CA
  • Mike, apparently Rene and your team did such a good job the rebate is even a bit higher than expected. Thanks for the good work.

    David G., Berkeley, CA
  • They took out our wall furnaces and installed an energy efficient 2 zone heating system. Mike explained his whole process step by step and provided me with many options. I was very pleased with the work they did and would recommend them to anyone.

    John, California
  • Fantastic company to work with, great service & reasonable prices! We moved into our current place & the air conditioning conked off within weeks! We interviewed & got quotes from several companies, Hassler gave us the best deal by far.

    Divya K., Belmont, CA
  • Just got our central heating put in and it has been an excellent experience thus far. For the majority of the install process had Max and Edgar at the site and they were extremely professional, courteous, clean, and on time.

    David P., San Diego, CA
  • Hassler Heating and AC really pulled through for me. I'm a landlord and one of my tenants reported that the HVAC system went completely out right during the hottest week of the year.

    Chris K., San Francisco, CA
  • Just completed first annual inspection. Chris was professional, responsive, timely, and easy to work with. 

    Chris E., Berkeley, CA
  • Hassler Heating is a terrific company! Their skills, professionalism, teamwork, and efficiency exceeded anything I could have imagined. Everyone I met was skilled, pleasant, competent and really committed to doing a great job.

    Debbie G., Richmond, CA
  • "Hassler Heating has always done a great job whenever I needed to call them. They are the only company I would call to service our Heating/AC unit. Paul came out yesterday to service our AC unit, he gave me a call ahead of time to let me know his ETA.

    J.P., Berkeley, CA
  • "Hassler replaced our entire house heating system and was one of the best companies we have ever hired for anything. Just great and so considerate and professional. Every contact was excellent, each employee was helpful and informative. They are true problem "solvers".

    Carol L., El Cerrito, CA
  • "Hired Mike to replace a heater and install a new air conditioner. The team did an outstanding job. They were professional, reliable, dependable, fast and left the area cleaner than when they started.

    Leila R., Berkeley, CA
  • "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. 

    Daniel S., Albany, CA
  • "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).

    Bertram T., Oakland, CA
  • I chose Hassler HVAC after talking to a few HVAC & insulation contractors about upgrading my house's insulation, heating, and water heater. These guys looked at the whole picture, gave great options & suggestions, had fair prices, and were always professional.

    Sean M., 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."

    Albert W., Oakland, CA
  • "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!

    Jean K., Oakland, CA
  • Tom R.

    "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.

    Tom R., San Rafael
  • Jeffery S.

    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.

    Jeffery S., Walnut Creek, CA
  • Veronica A.

    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.... Read More

    Veronica A., Hercules, CA
  • Scott L.

    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.

    Scott L., Lafayette, CA
  • Emily V.

    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!

    Emily V., Concord, CA

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Rising heat means rising cooling costs. Keep your bills down this summer in the El Cerito, California region with these tips and tricks to save.
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