| Business | Phone |
| Breezeway Heating & Cooling Prince Frederick 20678 | (410) 414-9599 |
| Continental Service 1030 Theater Dr, Prince Frederick 20678 | (410) 535-0091 |
| Patuxent Heating & Air Cond 3811 Cassell Blvd, Prince Frederick 20678 | (301) 855-9038 |
| Sure Air 101 Skipjack Rd # 5, Prince Frederick 20678 | (410) 535-2171 |
| Total Comfort Inc Prince Frederick 20678 | (410) 535-1800 |
| Tri-County Aire Inc 29211 Three Notch Rd, Prince Frederick 20678 | (410) 535-5854 |