- Affordable Air Systems Co
- Air Team
- American Air Specialties
- Beutler HVAC
- Diablo Valley Heating & Air
- Freschi Air Systems Inc
- Jet Hvac & Electric
- Mello's Sheet Metal Inc
- Monterey Mechanical Co
- N K Heating & Air Conditioning
- Plummers Heating & Sheet Metal
- Simonsen Climate Control
- Tri-City Heating & Air Cond
