Serving Berkeley, Oakland, and Alameda, Contra Costa, and Marin Counties!
heating cooling east bay

Homeowners in El Cerrito, Berkeley, San Rafael, and the surrounding areas deserve to have the best in heating and cooling preventative maintenance, installation, and repair. Hassler is proud to be recognized as East Bay area’s number one provider of home heating and cooling services, repairing, servicing, and installing the highest quality heating and cooling equipment available today for both residential and commercial buildings. We offer additional services such as duct leakage testing and installation of air filtration systems, ensuring that the air you and your family breathe is safe and clean.


We specialize in cost-effective, energy efficient heating solutions, and our team of experts is ready to help you find the perfect heating solution for your Bay Area home. We have years of experience in retrofitting older homes with new and more efficient systems, and we even offer custom design and installation for remodeling projects. Whether you need a new furnace, want to install a heat pump system, are considering mini-splits for your home, or simply need a repair, you can trust us with your heating needs. Our extensive knowledge of the climate in Berkeley, Richmond, Mill Valley, El Cerrito, and the surrounding areas will ensure that you get a solution that is truly tailored to your home. We specialize in the highest efficiency heating systems and equipment, so you can rest assured that you will enjoy significant energy savings and comfort for years to come.


We know that keeping your home cool can be a primary concern here in the East Bay area. Fortunately, the experts at Hassler are prepared to help you with your cooling needs, whatever they may be. We have helped homeowners install and repair air conditioning systems, convert to zoned air systems, take advantage of ductless mini-split technology, and so much more. We also offer preventative maintenance service agreements and emergency repair services to ensure that your cooling system will continue to function at its best, years after installation. So whether you have an already-existing system that needs servicing, or you are considering making the jump to a more energy efficient cooling system, Hassler has the answers and solutions you are looking for.

Indoor Air Quality

Indoor air quality continues to be a growing concern here in California, and for good reason — poor indoor air quality can lead to a variety of symptoms, including frequent headaches, fatigue, nausea, coughing, and allergies. We at Hassler are committed to helping Bay Area homeowners stay safe, healthy, and comfortable with our many indoor air quality services. Our professionals can perform indoor air quality testing, air seal your home, service your air filtration system, install medical-grade air purifiers, and more. So whether you have poorly maintained HVAC systems, improperly sealed windows and doors, or inadequate fresh air coming into your home, we at Hassler will do what it takes to keep you and your family safe and healthy all year long.

100% Satisfaction Money Back Guarantee On all Carrier® Installed Equipment

  • If for any reason you, the original purchaser, are not satisfied with your Carrier® system, Hassler will repair the problem to your satisfaction or remove the Carrier® products and refund the purchase price, subject to conditions and limitations. This guarantee will remain in effect for one year after the original installation date. This guarantee is non-transferable. Please contact us for conditions and limitations.

Hassler specializes in cost-effective, energy efficient heating services, including furnace installation, heat pump installation, heating system repair, and routine maintenance. We proudly serve Alameda, Contra Costa, and Marin counties and beyond, including El Cerrito and Oakland.

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Get a NOx code-compliant and energy efficient furnace installed by Hassler and experience more home comfort for years to come. Get started with our heating experts today.

image of a heat pump installed by Hassler

Get reliable heating and cooling with heat pump installation from the expert team at Hassler. Get started today and save with tax credits & rebates.

wall heaters

Designed to heat a specific zone or multiple rooms, a natural vent or direct-vent wall furnace is a smart, energy-saving solution to inefficient, electric baseboard or traditional heating systems.

Hassler provides new installation, repair, replacement and maintenance services for both natural vent wall heaters and direct vent heaters. Both types of heaters are an economical way to heat a small home or an individual space.  A direct vent heater is ideal in cases where it’s difficult to vent out the roof (they can vent directly out the side wall adjacent to the heater).

wall mounted mini split

Hassler Heating & Air provides comprehensive services for heat pumps and ductless mini split heat pumps, including installation, repairs, and maintenance. Operating without having to rely on a central ductwork system, mini splits provide whole-home comfort in ways that traditional heating and cooling systems cannot. 

hassler heating and air, hassler air conditioning, air conditioning ca

Want to achieve maximize indoor comfort, energy efficiency, and energy bill savings with your home cooling system? Hassler Heating and Air Conditioning is the leading air conditioning installation, replacement, and repair company for El Cerrito, Oakland, Berkeley, and the surrounding areas.

tankless water heater, plumbing, hassler, ca

An efficient water heater can have a major impact on home energy consumption, providing significant energy bill savings from month to month. Hassler is the expert in energy efficient water heating and installs tankless water heaters in El Cerrito, Oakland, Berkeley, and the surrounding areas.

smart thermostat el cerrito

With features like smartphone control and custom temperatures for different times of the day, a programmable thermostat can help you increase energy efficiency and save on home heating and cooling costs. Call Hassler about upgrading the thermostat in your El Cerrito or Oakland area home.

Hassler side of truck

HVAC zoning allows you to independently control heating and cooling for different "zones" within your home, providing greater indoor comfort and energy savings. Call Hassler if you're interested in a zoned air system for your home in Oakland, Berkeley, Albany, or the surrounding areas.

Shower head spraying water

If your utility bills are increasing because your old water heater is working harder to keep your water hot, it's time to think about replacing it. Hassler will help you find the best solution for your home, whether it be a traditional water heater or tankless.

Keep your home at the perfect temperature, all year round—

Experience the Hassler Difference!


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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.

Keep Everything Running Smoothly to Save You $$$ Down the Road
Convert both your gas furnace and gas water heater to a heat pump and heat pump water heater at the same time and get $2,500 for your old equipment.
Keep Your Home Healthy!
Home energy audit credited upon installation with Hassler
with Heat Pump or Heat Pump Water Heater Conversion
Apply for financing today!


Bring in the New Year with a New Furnace

old furnace east bay
Thursday, December 31, 2015

With the New Year upon us, many Bay Area residents are scrambling to pick up last-minute gifts and get ready for family and friends to visit.

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