| Business | Phone |
| Aero Environmental Svc Po Box 3, Dayton 21036 | (410) 531-8686 |
| Garrett Ac Refrig & Htg Inc 13921 Hallowell Ct, Dayton 21036 | (301) 854-2790 |
| Garrett Air Conditioning & Htg 13921 Hallowell Ct, Dayton 21036 | (301) 854-2700 |
| Ron Air Inc 4830 Ten Oaks Rd, Dayton 21036 | (301) 596-9090 |