Serving Alameda, Contra Costa, Marin Counties and Beyond!
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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...

  • Poor indoor air quality (IAQ) impacts your health and can make you sick or uncomfortable...

  • 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,...

  • Except for heating and air conditioning, our homes use more energy for water heating than any...

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.

Save $25 off your next heating or cooling repair. Any make, any model, Hassler is prepared to repair your heating and cooling equipment.

A comprehensive energy assessment from Hassler Heating will improve your home's efficiency and reduce your energy bill.

  • ....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

The latest from the Hassler Blog

larger ac unit
At Hassler Heating, we’re constantly working with our customers to help create cooler, more comfortable homes no matter how hot it gets outside. We often talk to El Cerrito, CA homeowners about how... Read more
air leaks in el cerrito home
Common Sources of Air LeaksDid you know heating and cooling costs are the largest energy expense for most homes? These costs account for around 48% of the energy use in a typical home. In the winter... Read more

Check us out on Yelp

At Hassler, we take customer satisfaction seriously. We have been on Yelp since 2010 and have more than 190 5-star reviews from happy customers. Our reviews reflect our commitment to home performance services, and our customers.

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