Ongaro & Sons, trusted since 1932, delivers expert heating, cooling, plumbing, electrical, and solar services in Northern California, proudly serving Sonoma County, Marin County, and Napa County. Our licensed technicians specialize in HVAC repair and installation (air conditioning, furnaces, heat pumps, ductless systems), water heater replacement, drain cleaning, sewer services, electrical panel upgrades, whole home generators, EV charging stations, and solar energy system installation. Family owned, licensed, bonded and insured, with a 100% Satisfaction Guarantee. We offer energy efficient upgrades, indoor air quality solutions, maintenance plans, financing options, and guidance on federal, state, and local rebates to help you save.