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Hassler HVAC is now serving Santa Rosa, CA - and the surrounding areas!

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Find My Home Energy Score!

energy audit, hassler, california, ca

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

home upgrade, hassler, california, ca
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.
woman sniffing clean air in home with mug in hands

Receive a $499 value for only $100 with this limited time offer

Schedule your Home Energy Assessment to find out how your home ranks and how you can benefit from improving your score. 

  • NEW

    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 & 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. They squeezed a whole... Read More

    Sean M., Oakland, 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).
    Polite, courteous. Clear explanations of the problems and the... Read More

    Bertram T., Oakland, 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. 
    ... Read More

    Daniel S., Albany, 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. Any questions I had after installation were answered quickly and they even came out to... Read More

    Leila R., 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". We installed an... Read More

    Carol L., El Cerrito, 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. He was very professional &... Read More

    J.P., 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.  I am so happy with our new furnace and duct work and our new... Read More

    Debbie G., Richmond, CA
  • Just completed first annual inspection. Chris was professional, responsive, timely, and easy to work with. 
    I really like the annual maintenance program. No worrying about changing a filter or keeping this important piece of equipment running an extended... Read More

    Chris E., Berkeley, 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. Hassler Heating and AC was very responsive and understood my sense of urgency to respond to my tenant... Read More

    Chris K., San Francisco, 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. Max would consult me on any part of the project that was anything... Read More

    David P., San Diego, CA
  • 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
  • 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
  • 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.  Your commitment to qualifying and getting the rebate was a key factor of why my wife and I chose your company for the installation over other companies... Read More

    David G., Berkeley, CA
  • ....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

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...

  • Are you suffering from allergy like symptoms in your own home? Hassler's indoor air quality team...

  • 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...

  • Keep your employees comfortable, & your monthly heating and cooling expenses at a minimum...

  • Protect your home from outside contaminants, and uncomfortable temperatures when you seal up the...

  • Hassler Heating is now installing & servicing heat pump water heaters for energy efficient...

  • Hassler provides installation, repair and maintenance services for heat pumps which is a cost-...

Why Choose Hassler

The latest from the Hassler Blog

mini splits vs central ac video thumbnail
Watch as Hassler explains the difference between a standard central air conditioning system, and the versatile, efficient heating and cooling power of a ductless mini split heat pump. Hassler Heating... Read more
Two sets of hands holding house with energy audit
Is your air conditioner ready for the marathon of summer? Scheduling home energy assessment with Hassler will provide you with all the info you need to save on your cooling bills in Alameda, Contra... Read more
Nate Hassler Heating
angie's list super service award 2016
2017 Carrier Presidents Award Hassler Heating
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BBB Accredited
diamond certified Hassler Heating
Carrier Factory Authorized Dealer