| Business | Phone |
| Area Heating Cooling & Mech 1450 Jeffco Blvd, Arnold 63010 | (636) 282-7100 |
| Busch Heating & Cooling Inc 1923 Meyer Drury Dr, Arnold 63010 | (314) 845-3125 |
| Century Heating & Cooling 3963 W Outer Rd, Arnold 63010 | (636) 464-0088 |
| Controlled Heating & Air Cond 4700 Happy Ln, Arnold 63010 | (636) 296-2627 |
| Crystal Heating & Cooling 3 Cave Industrial Ct, Arnold 63010 | (636) 296-9292 |
| Earl's Heating & Air Cond 2323 Saint Joseph Dr, Arnold 63010 | (636) 287-3379 |
| Noll Heating & Cooling 11 Grandview Park Dr, Arnold 63010 | (314) 487-2936 |
| Marciante Heating & Cooling 1315 Missouri State Rd, Arnold 63010 | (636) 282-3424 |