Serving Berkeley, Oakland, and Alameda, Contra Costa, and Marin Counties!
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.
BBB Accredited
diamond certified Hassler Heating
Nate Hassler Heating
angie's list super service award 2016
energy upgrade ca logo
green nextdoor logo
BayRen+ Home Rebate Program