Serving Alameda, Contra Costa, Marin Counties and Beyond!
  • Mount Tamalpais
  • oakland
  • mt diable

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.

Heating and cooling systems need regular maintenance. Hassler has the know-how to keep your systems running at the highest efficiency.

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

What our customers are saying

  • ....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

The latest from the Hassler Blog

Hassler Contractor of the Year
Hassler was featured on recently for being the 2015 Home Upgrade Program Contractor of the Year. EL CERRITO, Calif. — Hassler Heating and Air Conditioning Inc. of El Cerrito, California... Read more
2015 PGE Contractor of the Year
SAN RAMON, CA (March 8, 2016)– Hassler Heating and Air Conditioning, Inc. of El Cerrito was recently named the 2015 Home Upgrade Program Contractor of the Year by PG&E and Energy Upgrade... 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.

BBB Accredited
diamond certified Hassler Heating
Carrier Factory Authorized Dealer
Nate Hassler Heating
angies list Hassler
Presidents Award