| Business | Phone |
| Airconditioning & Heat Pumps 19629 Gunners Branch Rd, Germantown 20876 | (301) 353-1687 |
| Atc Heating & Cooling 19023 Leatherbark Dr, Germantown 20874 | (301) 428-9600 |
| Switzerland Air Germantown 20874 | (301) 540-0099 |
| Blue Seal Of Quality Air Cond 11404 Honeybear Ln, Germantown 20876 | (301) 540-4800 |
| Don Hoffacker's Air Cond 19703 Waters Rd, Germantown 20874 | (301) 972-0017 |
| F S Campbell Co 14111 Seneca Rd, Germantown 20874 | (301) 869-1843 |
| Germantown Services 13838 Bronco Pl, Germantown 20874 | (301) 428-9202 |