Serving Alameda, Contra Costa, Marin Counties and Beyond!

A NATE Quality Circle Contractor has at least 80% of their total technicians NATE certified. This high level of certification means they are ensuring their technicians are capable of providing the highest-quality service to their customers.

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.
BBB Accredited
diamond certified Hassler Heating
Carrier Factory Authorized Dealer
Nate Hassler Heating
angie's list super service award 2016
Presidents Award