| Business | Phone |
| Bismarck Heating & Air Cond 913 S 18th St, Bismarck 58504 | (701) 223-2338 |
| City Air Mechanical Inc 3505 E Rosser Ave, Bismarck 58501 | (701) 223-3775 |
| Comfort Zone Heating & Air 1729 Catherine Dr, Bismarck 58501 | (701) 258-3946 |
| Northern Plains Plumbing Htg 2510 Vermont Ave, Bismarck 58504 | (701) 222-2155 |
| Home Specialists Bismarck 58501 | (701) 530-0848 |
| J F Refrigeration Heating 1402 E Avenue E, Bismarck 58501 | (701) 255-3942 |