| Business | Phone |
| Kirkwood Heating & Air Conditioning 9350 Watson Industrial Park, St Louis 63126 | (314) 968-3453 |
| County Heating & Cooling Co 6921 Olive Blvd, St Louis 63130 | (314) 725-1900 |
| Air Comfort 11920 Missouri Bottom Road, St Louis 63042 | (314) 814-8461 |