| Business | Phone |
| Jakes Five Star Htg & Cooling 605 N Main St, Royal Oak 48067 | (248) 547-2200 |
| Joe Calverley Heating & Cool Royal Oak 48067 | (248) 399-2178 |
| Kent Brothers Metal Master Inc Royal Oak 48073 | (248) 549-4579 |
| A & H Mechanical 309 N Minerva Ave, Royal Oak 48067 | (248) 543-4448 |
| A Aaall Svc Mechanical 1902 Crooks Rd, Royal Oak 48073 | (248) 350-1314 |
| Aircon Heating & Cooling Inc 4850 Leafdale Blvd, Royal Oak 48073 | (248) 280-1393 |
| All & All Svc Heating & Clng Royal Oak 48067 | (248) 547-1111 |
| All Service 1902 Crooks Rd, Royal Oak 48073 | (248) 548-1550 |
| American Mechanical Inc 4260 Edgeland Ave, Royal Oak 48073 | (248) 549-8100 |
| American Quality Temperature 1316 N Campbell Rd, Royal Oak 48067 | (248) 399-2738 |
| Asco Service 1026 E 11 Mile Rd, Royal Oak 48067 | (248) 546-2323 |
| Bane Heating Co 3308 Chester Rd, Royal Oak 48073 | (248) 549-4380 |
| Stewart Environmental Svc Co 4511 Delemere Blvd, Royal Oak 48073 | (248) 549-0400 |
| Mig Welder 2220 Dallas Ave, Royal Oak 48067 | (248) 544-8310 |
| Rooftop Mechanical Systems 1818 Bellaire Ave, Royal Oak 48067 | (248) 541-7745 |
| Comfort Zones Htg & Cooling 2816 Benjamin Ave, Royal Oak 48073 | (248) 435-2425 |
| Commercial Climate Controls 4900 Leafdale Blvd, Royal Oak 48073 | (248) 435-6644 |
| Coram's Heating & Cooling 3106 N Alexander Ave, Royal Oak 48073 | (248) 585-6637 |
| Custom Temperature Control Inc 30134 Woodward Ave, Royal Oak 48073 | (248) 549-9090 |
| President Air Comfort Duct 2013 Parmenter Blvd # 218, Royal Oak 48073 | (248) 655-0474 |
| Done Heating & Cooling Royal Oak 48067 | (248) 398-8150 |
| Hauser Heating & Cooling Royal Oak 48067 | (248) 259-2560 |
| Hinson Heating & Air Cond Inc 827 E 4th St, Royal Oak 48067 | (248) 541-7007 |