| Business | Phone |
| A & A Heating Oil Co 4625 Asbury Ave, Baltimore 21206 | (410) 325-2600 |
| Accent Oil Tak & Furnace Baltimore 21229 | (410) 247-1188 |
| Accent Oil Tank & Furnace Rmvl Baltimore 21218 | (410) 467-4000 |
| America's Best Heating & Ac 44 E Randall St, Baltimore 21230 | (410) 528-1685 |
| Artic Air 4309 Harford Rd, Baltimore 21214 | (410) 426-1390 |
| Ashby's Plumbing & Heating 4320 Old York Rd, Baltimore 21212 | (410) 532-2674 |
| Best Mechanical Inc 6207 Harford Rd, Baltimore 21214 | (410) 444-5448 |
| Clean Air Heating & Air Cond 1911 Portal St, Baltimore 21224 | (410) 633-8350 |
| Coldspring Co Inc 4409 Towanda Ave, Baltimore 21215 | (410) 367-8719 |
| Conwell & Sons Svc Co 2324 Druid Park Dr, Baltimore 21215 | (410) 462-5738 |
| Paul Belschner Inc 5911 Saint Marys St, Baltimore 21207 | (410) 744-6182 |
| Perry Hall Heating & Air Cond 7619 Fitch Ln, Baltimore 21236 | (410) 256-7285 |
| Power Misers 9618 Belair Rd, Baltimore 21236 | (410) 256-6977 |
| Precision Environmental System 1530 Caton Center Dr, Baltimore 21227 | (410) 242-8525 |
| Farnen & Dermer 4010 W Belvedere Ave, Baltimore 21215 | (410) 833-3961 |
| Fitz Mechanical 6311 Harford Rd, Baltimore 21214 | (410) 821-5560 |
| Four Seasons Cooling & Heating 6400 Frankford Ave # 14, Baltimore 21206 | (410) 485-0800 |
| Harford Insulation Inc Harford Rd & Royston Aveamp;, Baltimore 21214 | (410) 426-0924 |
| Harry Sparks Mechanical Svc 2107 Boston St, Baltimore 21231 | (410) 327-3711 |
| Horton Mechanical Plumbing 5223 Cedgate Rd, Baltimore 21206 | (410) 485-8547 |
| Jones Waste Oil 5131 Chalgrove Ave, Baltimore 21215 | (410) 466-6705 |
| L W Brown Heating & Cooling 1201 Bernard Dr, Baltimore 21223 | (410) 233-8960 |
| M & W Heating & A/C Repairs 607 Willow Ave, Baltimore 21212 | (410) 532-8511 |
| Schildt Services 7347 Tred Avon Rd, Baltimore 21220 | (410) 335-8011 |
| Ace Metal Products Co 8008 Pinewood Rd, Baltimore 21222 | (410) 288-3731 |
| Morningstar Plumbing & Heating 1185 James St, Baltimore 21223 | (410) 727-8122 |
| Alexander Electric 6803 Southern Cross Ct, Baltimore 21207 | (410) 484-0377 |
| Precision Mechanical Inc 3620 Hickory Ave, Baltimore 21211 | (410) 889-1077 |
| Quartner's Refrigeration Svc 6109 Oakleaf Ave, Baltimore 21215 | (410) 356-2500 |
| Roman Co 1727 Llewelyn Ave, Baltimore 21213 | (410) 732-2072 |
| West Home Improvement Co 422 S Pulaski St, Baltimore 21223 | (410) 947-1617 |
| Eastern Air Conditioning 10051 Pulaski Hwy, Baltimore 21220 | (410) 574-2437 |
| Four Seasons Cooling & Htg Baltimore 21237 | (410) 391-8057 |
| J M Taylor Inc 6500 Moravia Park Dr, Baltimore 21237 | (410) 288-0060 |