AIRSYS Authorized Service Companies: Pacific
California
- Advanced Heaeting and Air Conditioning (California)
- Amber Air Conditioning (California: Riverside, San Diego, Orange, LA Counties)
- Broken Arrow (California)
- CM Service Inc (California)
- Courtesy Air Inc (California: Southern)
- DP Air Corp (Northern California)
- Electronic Environments Corp. (California: North East, South East, West Coast)
- Elite Control (California: Northern)
- MacDonald Miller (Washington, Oregon, some areas of California)
- PDC Corp (California: Northern (Livermore), Southern (Orange-Poway))
- Pearce Services (Northern, Central, Southern California)
- RL Clotworthy Construction/Lake Air (California)
- Southcoast Heating and Air Conditioning (California: San Diego to Los Angeles)
Oregon
- MacDonald Miller (Washington, Oregon, some areas of California)
- Pacific Air Control (Washington, Oregon)
- Kasco of Idaho (Washington, Oregon)
- Siemens: Building Technologies (USA) (Washington, Oregon)
Washington
- AMS Spokane (Washington)
- MacDonald Miller (Washington, Oregon, some areas of California)
- Pacific Air Control (Washington, Oregon)
- Performance Mechanical Group (Washington)
- Kasco of Idaho (Washington, Oregon)
- Siemens: Building Technologies (USA) (Washington, Oregon)