California HVAC leads

How California homes are heated

Gas from the utility main is the California norm for heat. In table B25117 of the ACS 5-year 2020-2024, 5,236,072 of 7,567,568 owner-occupied homes heat with utility gas, 69.2%, the tenth highest share of any state. Electricity heats 1,589,248 owner homes, 21.0%, and propane another 4.1%.

Two smaller rows stand out. Solar energy is the main heating fuel in 140,196 owner homes and wood in 135,486, and 106,363 owner homes report using no heating fuel at all. Across all 13,548,091 occupied homes, the B25040 table (2020-2024 ACS) puts utility gas at 61.0%. For an HVAC buyer, the gas majority means most replacement quotes start from a gas furnace, with an electric heat pump as the alternative the owner may weigh. These counts describe homes, not the number of leads from any fuel group.

California HVAC contractor licensing

California licenses HVAC contractors through the Contractors State License Board, using specialty classifications set out in Title 16 of the California Code of Regulations. Three of them cover heating and cooling work (CSLB descriptions checked October 8, 2026):

• C-20 Warm-Air Heating, Ventilating and Air-Conditioning: fabricates, installs, maintains, services and repairs warm-air heating systems and water heating heat pumps, ventilating systems and air-conditioning systems, with their ducts, registers, flues, humidity and thermostatic controls and air filters, including systems that use solar energy.
• C-38 Refrigeration: refrigerators, refrigerated rooms and the related units, ducts and controls for temperatures below 50°F.
• C-4 Boiler, Hot Water Heating and Steam Fitting: boilers, hot-water heating systems and steam fitting, with their piping, radiators, convectors and flues.

For residential comfort heating and cooling, C-20 is the classification a buyer would expect a contractor client to hold. The project size at which any CSLB license becomes necessary is covered on leads in California. Refrigerant work also needs federal technician certification under EPA Section 608.

California counties by owner-occupied homes

These ten counties have the most owner-occupied homes in California. The gas and electricity columns are shares of owner homes by main heating fuel, from the ACS 5-year 2020-2024 county tables B25003 and B25117. They describe housing and do not indicate lead counts.

The ten are similar: every one heats at least 64% of owner homes with gas. Ventura is the most gas-heated at 79.7%, Sacramento the most electric at 29.4%, and San Diego has the largest propane share of the ten at 4.8%, in the same county data (2020-2024 ACS). Los Angeles County alone holds 1,567,983 owner homes, about a fifth of the state total.

What California HVAC buyers filter on

California HVAC buyers would work with the same filters used for other home services, and the facts above explain why each one matters in this state:

• Project type: for example install, replace or repair, for heating or cooling, with furnace work the default in a gas state.
• Homeowner status: the 7,567,568 owners above, in a state where about 44% of households rent (ACS 2020-2024, B25003).
• Timeframe: a summer cooling failure inland versus a planned furnace replacement before winter.
• ZIP code: lets a buyer choose coastal or inland territory instead of working from a statewide average.

When HVAC opens, California buyers will set these filters per campaign, down to the ZIP code, as on Summit’s other home services leads. Once HVAC opens, HVAC leads will be exclusive by default, with shared delivery on request. For the full field list, open the sample HVAC lead.