| Kidder Heating & AC 94 Michigan Ave E (269)963-2100 | ABCO Heating Cooling & Chimney Service 67901 Dequindre Rd (586) 752-4380 | B P H Mechanical Services 421 E Fairplains St (616) 754-9353 |
| T I Group Automotive Systems 50695 Chesterfield Rd (586)949-6370 | Great Lakes Svc Inc PO Box 116 (906)632-5543 | River City Mechanical Inc 5325 6 Mile Ct NW (616)785-1311 |
| GMB Architects-Engineers 85 E 8th St, #200 (616) 796-0200 | Supreme Heating & Cooling Llc 14641 E Warren Ave 3138852400 | Economy Heating & Cooling 12255 Dearmyer Rd (517) 592-8665 |
| All Star Heating & Air Cond 68 E Dansville Rd (517)202-3325 | Great White Mechanical Llc 14530 E 11 Mile Rd 5864452871 | Long's Mechanical Heating 52755 Van Dyke Ave (586)731-7314 |
| Hale Contracting Incorporated 18407 Weaver St (313) 272-9400 | Aaa Dunlap Svc Network 898 S Main St 7346974300 | CHS 2060 E Main St (989)658-4328 |
| Boss Engineering & Surveying 517 Bridge St (231) 547-2872 | D & E Comfort Heating 316 N Center St (248) 349-0180 | Cedar Heating & Cooling Inc 15260 Northland Dr (616) 696-2599 |
| Jackson Heating 5021 N Henderson Rd (810)653-9346 | Dowagiac Heating & AC 55070 M 51 N (269)782-3810 | G W Heating & Air Conditioning 1905 N Michigan Ave (989)753-8476 |
| Dorer Engineering 3140 Ruler Drive (248)624-7844 | David Richards Engineering Corporation 1201 Rochester Road (248)589-9509 | Bezy Heating & Cooling 22112 Alger St (586)778-0363 |
| Engineered Products Inc 601 Kelso Street (810)767-2050 | Mulligan Heating 2856 S Main St (734) 222-0624 | Geofurnace Systems 886 Us Highway 31 S 8009223045 |
| Total Comfort Solutions PO Box 363 (616)784-4827 | D & L Heating & Air Cond 16146 S Us Highway 27 (517)482-5729 | Midwest Energy Co Op 60590 Decatur Rd 2694452477 |
| Cli-Max Control 2220 Dallas Ave (248) 544-8310 | Comfort Zone 8108362541 | AAA All Svc 25140 Lahser Rd (248)746-0516 |
| Cannon Engineering 51761 Danview Technology Centre (586)991-0054 | Delta Heating & Cooling 2628 Glenwood Rd (248)549-3377 | A+ Heeting & AC 5819 Hollywood Rd (269)876-2493 |
| Eggert Heating 4107 S Genesee Rd (810)742-6880 | Reasonable Heating & Cooling 925 Mayer Rd (810)367-2003 | Viero Energy 19111 W 10 Mile Rd 2483276938 |