| Business | Phone |
| Abl Air Heating & Air Cond 140 Mulock Dr, Newmarket L3Y 7C5 | (905) 895-0681 |
| Action Heating Co 336 Millard Ave, Newmarket L3Y 1Z4 | (905) 898-3860 |
| Air Force Air Conditioning 1260 Journey's End Cir #5, Newmarket L3Y 7V1 | (905) 836-9300 |
| Aircon Mechanical Systems Inc 1260 Journey's End Cir, Newmarket | (905) 853-7155 |
| S R Gillis & Sons Ltd 1260 Journeys End Cir #18, Newmarket L3Y 7V1 | (905) 898-6707 |
| Sheridan Heating 293 Queen St, Newmarket L3Y 2G3 | (905) 895-6950 |
| Tristar Mechanical Svc 19110 Dufferin St, Newmarket L3Y 4V9 | (905) 775-5477 |
| Built Byrond Design Air System 110 Pony Dr #14, Newmarket L3Y 7B6 | (905) 895-3033 |
| Canco Electric Heating & Ac 1235 Gorham St #13, Newmarket L3Y 7V1 | (905) 898-3912 |
| Direct-Air Heating & Air Cond 17915 Leslie St, Newmarket L3Y 3E3 | (905) 883-0214 |