| Business | Phone |
| Accu-Temp Heating & Air Cond 1085 Grand Oaks Dr 100, Howell 48843 | (517) 548-1555 |
| Aaa Service Network & Parts 4675 E Grand River Ave, Howell 48843 | (517) 548-5040 |
| Weathervane Heating & Cooling 321 E Clinton St, Howell 48843 | (517) 545-0100 |
| Universal Heating 1361 Hoskins Dr, Howell 48855 | (517) 545-7324 |
| Space Mechanical 2801 W Grand River Ave, Howell 48843 | (517) 546-0667 |
| Classic Water Conditioning Inc 10107 Bergin Rd, Howell 48843 | (517) 548-3720 |
| Comfort Heating & Cooling 10200 Betterly Rd, Howell 48855 | (517) 545-0152 |
| Johnson Heating & Cooling 3993 Fisher Rd, Howell 48855 | (517) 546-7328 |
| Schutz & Co., Inc. Heating & Cooling 6851 Oak Grove Rd, Howell 48855 | (517) 552-4039 |