AC Installation & Replacement in Knightsen, CA
Replace your old AC with the right system
Whether your old air conditioner has finally quit or you want to add central air, Blue Star Heating & Air installs new AC systems, full split systems and heat pumps in Knightsen. We size the system to your home, install it the way the manufacturer specifies, and handle the permit.
- From our Antioch shop
- About 8 miles southeast
- ZIP code
- 94548
- Power
- PG&E delivery, MCE generation
- Permits
- Contra Costa County Dept. of Conservation & Development – Building Inspection
Serving Knightsen
We serve every part of Knightsen, including Knightsen Farm Bureau hall, Knightsen Elementary School, Delta Rd and Sellers Ave - it's about 8 miles southeast via Main St and Sellers Ave from our Antioch shop. When a propane furnace in a 1970s Knightsen home wears out, a heat pump is worth a look, and we pull the permit through Contra Costa County Building Inspection. Many statewide heat pump rebates are closed for 2026, so when we quote we check what's still open for your address, such as MCE's home energy programs for Knightsen customers and BayREN's income-qualified EASE Home program.
Main roads
- Delta Rd
- Knightsen Ave
- Sellers Ave
- East Cypress Rd
- Byron Hwy
Around Knightsen
- Knightsen Farm Bureau hall (1922)
- Knightsen Elementary School; the oldest 4-H chapter in California
Other services in Knightsen
All servicesFor businesses
Questions before you call
Do I need a permit to replace my AC in Knightsen?
Yes. Replacing an AC, furnace or heat pump in California requires a mechanical permit - in Knightsen that comes from the Contra Costa County Dept. of Conservation & Development, Building Inspection. Most replacements also need Title 24 duct leakage testing verified by a third-party HERS rater. We pull the permit and coordinate the inspection.
How much does a new AC cost in Knightsen?
It depends on the size of the home, the type of system, the efficiency level and the condition of your ductwork. We give you a written quote after looking at the house, with more than one option.
Are there rebates for a new system in Knightsen?
Some, but fewer than before. TECH Clean California and California's HEEHRA heat pump rebates are fully reserved, and the federal 25C tax credit ended for systems installed after 2025. What's left for Knightsen homes is mainly MCE's home energy programs for Knightsen customers and BayREN's income-qualified EASE Home program. Programs change often, so we check what's open for your address when we quote.