| Business | Phone |
| Design Fabricators Inc 8301 Mapleville Rd, Mt Airy 21771 | (301) 829-1914 |
| Don Robinson Heating & Air 28711 Ridge Rd, Mt Airy 21771 | (301) 831-7831 |
| J M Fletcher Htg & Ac 6156 Woodville Rd, Mt Airy 21771 | (301) 829-7980 |
| Kws Heating & Air Cond Mount Airy Rd, Mt Airy 21771 | (301) 829-5335 |
| Mt Airy Heating & Air Cond 4406 Highboro Dr, Mt Airy 21771 | (301) 831-7742 |