- A C Plumbing Heating & Air
- Air Central
- Air Master
- Air-O Svc
- Cascade Comfort Svc
- Circle N Heating & Air Cond
- Dean's Air Conditioning & Htg
- Gard & Sons Heating & Plumbing
- Palo Cedro Heating & Air Cond
- Redding Heating & Air
- Redding Plumbing Heating & Air
- RMC Refrigeration & Air Cond
- Urban Mechanical Svc
