| Business | Phone |
| A B Comfort Weather Air Cond 15 Pleasant View Dr, North York M2J 3P6 | (416) 495-0563 |
| A-1 Mechanical Air 84 Colville Rd, North York M6M 2Y4 | (416) 244-4064 |
| Air Treatment Heating 49 Densley Ave, North York M6M 2P5 | (416) 235-0373 |
| Honeywell Limited 300 Yorkland Blvd, North York M2J 1S1 | (416) 758-2600 |
| Hts Engineering Ltd 115 Norfinch Dr, North York M3N 1W8 | (416) 661-3400 |
| Magtech Mechanical Systems Inc 108 Rameau Dr, North York M2H 1V1 | (416) 497-4803 |
| Mancini Heating & Air Cond Ltd 1094 Barmac Dr, North York M9L 2X3 | (416) 249-5848 |
| Maple Tek Inc 2911 Bayview Ave, North York M2K 1E8 | (416) 229-0271 |
| Marathon Refrigeration 101 Toro Rd, North York M3J 2Z1 | (416) 636-3302 |
| Niagara Mechanical Svc Ltd 12 Penn Dr #4, North York M9L 2A9 | (416) 748-3882 |
| Northern Air Environmental 107 Tycos Dr, North York M6B 1W3 | (416) 789-7511 |
| North York Air Conditioning 571 Glengrove Ave, North York M6B 2H5 | (416) 782-4346 |
| Nortown Air 49 Densley Ave, North York M6M 2P5 | (416) 235-2727 |
| P J Mechanicals 32 Bunty Lane, North York M2K 1W6 | (416) 225-1466 |
| Pioneer Heating & Air Cond 130 Lepage Crt #1, North York M3J 3J1 | (416) 638-5814 |
| Remco Mechanical 240 Pellatt Ave, North York M9N 2P7 | (416) 248-2360 |
| Rizzo Heating & Air Cond Co 175 Toryork Dr #16, North York M9L 2Y7 | (416) 743-3972 |
| Shenstone Heating & Air Cond 5000 Dufferin St, North York M3H 5T5 | (416) 667-0117 |
| Supply Air Heating & Air 32 Walsh Ave, North York M9M 1B7 | (416) 249-5604 |
| Triad Engineering Ltd 141 Sheppard Ave E, North York M2N 3A6 | (416) 733-7754 |
| Triple Point Air Conditioning 130 Lepage Crt #32, North York M3J 3J1 | (416) 638-9008 |
| Tropic Air Heating & Cooling 32 Yucatan Rd, North York M2H 2K8 | (416) 492-7633 |
| York International 2323 Winston Park Dr, North York | (416) 829-1411 |
| Communication Air Supply Ltd 46 Glendora Ave, North York M2N 2V7 | (416) 492-6216 |
| Cool World Co 8 Covington Rd, North York M6A 3E5 | (416) 781-1215 |
| Cool Estate.Com 2615 Keele St, North York M6L 2P2 | (416) 266-5378 |
| Cougar Refrigeration & Air 616 Trethewey Dr, North York M6M 4C3 | (416) 762-4209 |
| Cozy Comfort Plus Inc 130 Bentworth Ave #200, North York M6A 1P7 | (416) 780-9760 |
| Demco Mechanical Svc 543 Steeles Ave W, North York M2M 3Y1 | (416) 222-9160 |
| Esso Home Comfort Ctr 953 Wilson Ave, North York M3K 1Y8 | (416) 638-7702 |
| Far-Furn Heating & Air Cond 48 Millwick Dr, North York M9L 1Y3 | (416) 749-9202 |
| Garney Heating & Air Cond 223 Bridgeland Ave, North York M6A 1Y7 | (416) 783-6151 |
| General Heating & Cooling 553 Marlee Ave, North York M6B 3J6 | (416) 233-6723 |