| Business | Phone |
| All State Plbg Htg & Cooling 215 Ritchie Ln, Glen Burnie 21061 | (410) 766-0759 |
| Carrier Enterprises 6711 Baymeadow Dr, Glen Burnie 21060 | (410) 553-9400 |
| Coastal Heating & Air Cond Co Glen Burnie 21061 | (410) 766-1353 |
| Community Cooling & Heating 227 Thelma Ave, Glen Burnie 21061 | (410) 969-5990 |
| Cropp-Metcalfe Air Cond & Htg Glen Burnie 21061 | (410) 760-1153 |
| Lindy M Redding Central Ac 1701 Crain Hwy S, Glen Burnie 21061 | (410) 761-1800 |
| N & J Inc 604 Carl Ave, Glen Burnie 21060 | (301) 332-2122 |
| R E Michel Co 1 Isuzu Way, Glen Burnie 21060 | (410) 766-8529 |
| Scardina Plumbing & Heating Glen Burnie 21061 | (410) 761-6900 |