| 1122527 Ontario Inc. | G.B. Mechanical | 2432 Cyprus Ave, Burlington, ON L7P 1G6 | W99HC0679 95 |
| 1246175 Ontario Limited | Active Mechanical | 3153 Wharton Way, Mississauga, ON L4X 2B6 | W99PC0328 98 |
| Allan Ross Heating, Air Conditioning & Refrigeration Ltd. | Allan Ross Heating, Air Conditioning & Refrigeration Ltd. | 75 Chipmunk Cres, Brampton ON L6R 1B4
| W99HC0004 13 |
| Anderson Sheet Metal Ltd. | Anderson Sheet Metal Ltd. | 1302 Britannia Rd, Mississauga, ON L4W 1C8 | W99HC0209 93 |
| Aquarius Mechanical Contractors Incorporated | Aquarius Mechanical Contractors Incorporated | 200 Edgeley Blvd, Unit 7, Concord, ON L4K 3Y8 | W99hC0089 81 |
| Ascot Air Systems Inc. | Ascot Air Systems Inc. | 20 Automatic Rd, Unit 7-9, Brampton, ON L6S 5N6 | W99HC0227 97 |
| B.I.C. Mechanical Limited | B.I.C. Mechanical Limited | 6 Gidley Crt, Penetanguishene, ON L9M 0A7 | W99HC0156 92 |
| Battershell Plumbing & Heating Ltd. | Battershell Plumbing & Heating Ltd. | 254 Queen St W, Brampton, ON L6X 1B1 | W99PC0289 75 |
| Ber-Cool Ltd. | Ber-Cool Ltd. | 510 Rowntree Dairy Rd, Unit 3, Woodbridge, ON L4L 8H2 | W99HC0182 77 |
| Black & McDonald Limited | Black & McDonald Limited | 31 Pullman Crt, Scarborough, ON M1X 1E4 | W99PC0639 92 |
| C.M.S. Commercial Mechanical Services Ltd. | C.M.S. Commercial Mechanical Services Ltd. | 2721 Markham Rd, Unit 10, Scarborough, ON M1X 1L5 | W99HC0803 93 |
| Circa Refrigeration Inc. | Circa Refrigeration Inc. | 25 Fisherman Dr, Unit 18, Brampton, ON L7A 1C9 | W99Hc0084 78 |
| Dunford-Liscio (Ontario) Inc. | Dunford-Liscio (Ontario) Inc. | 2 Carson Crt, Brampton, ON L6T 4P8 | HC0001 16 |
| E-M Air Systems Inc. | E-M Air Systems Inc. | 69 Romina Dr, Concord, ON L4K 4Z9 | W99HC0562 87 |
| Encore Heating & Air Conditioning Inc. | Encore Heating & Air Conditioning Inc. | 7033 Telford Way, Unit 12, Mississauga, ON L5S 1V4 | W99HC005 03 |
| Enercare Home and Commercial Services Limited Partnership | Enercare Home and Commercial Services Limited Partnership | 7400 Birchmount Rd, Markham, ON L3R 5V4 | W99HC0002 14 |
| Hendry Heating Limited | Hendry Heating Limited | 81 Penn Dr, Weston, ON M9L 2A6 | W99HC0205 75 |
| Hi-Rise Mechanical Contracting Inc. | Hi-Rise Mechanical Contracting Inc. | 60 Saramia Cres, Unit 7, Vaughan, ON L4K 4J7 | W99HC0638 93 |
| Jrl Hvac Inc. | Jrl Hvac Inc. | 278 Rutherford Rd S, Brampton, ON L6W 3K7 | W99HC0001 03 |
| Kelson Mechanical Inc. | Kelson | 2 Bales Dr, Sharon, ON L0G 1VO | HC0001 20 |
| Kirk Mechanical Limited | Kirk Mechanical Limited | 1451 Grahams Ln, Burlington, ON L7S 1W5 | W99PC0214 82 |
| Naylor Building Partnerships Inc. | Naylor Building Partnerships Inc. | 455 North Service Rd E, Oakville ON L6H 1A5
| HC0001 15 |
| Northwest Gas Limited | Northwest Gas Limited | 171 Advance Blvd, Unit 10, Brampton, ON L6T 4Z7 | W99HC0022 90 |
| Omico Mechanical Limited | Omico Mechanical Limited | 80 Bass Pro Mills Dr, Unit 1, Concord, ON L4K 5W9 | W99HC0676 75 |
| Ontario Metal Industry Ltd. | Olar Mechanical Contracting | PO Box 37, Inglewood, ON L7C 3L6 | W99HC0158 91 |
| PEATSON'S HEATING & AIR CONDITIONING LTD. | PEATSON'S HEATING & AIR CONDITIONING LTD. | 46B West Dr #1, Brampton ON L6T 3T6
| W99HC0243 75 |
| Powerful Group of Companies Inc. | Dexterra on Demand | 6535 Millcreek Dr #75, Mississauga, ON L5N 2M2 | W99BR0011 14 |
| Reliable Mechanical Services Inc. | Reliable Mechanical Services Inc. | 4 Holland Dr, Unit 10, Bolton, ON L7E 1G1 | W99HC0052 94 |
| S.I.G. Mechanical Services Limited | S.I.G. Mechanical Services Limited | 51B Esna Park Dr, Markham, ON L3R 1C9 | W99HC0407 78 |
| SE Canada Inc. | Service Experts Commerical HVAC | 32 Selby Brampton, ON L6W 3L7 | W99HC0001 13 |
| Special Gas Services Limited | Special Gas Services Limited | 69 David St, Brampton, ON L6X 1J6 | W99HC0001 14 |
| Sprint Mechanical Inc. | Sprint Mechanical Inc. | 50 Woodbine Down, Toronto, ON M9W 5R2 | W99hc0511 88 |
| Stellar Hi-Rise Mechanical Inc. | Stellar Hi-Rise Mechanical Inc. | 126 Edilcan Dr, Vaugan ON L4K 3S5
| PC 101144 24 |
| Steve Cumberland and Mark King | Tandem Air Specialists | 295 Queen St E Unit6, Brampton, ON L6W 4S6 | HC0001 19 |
| Strategic HVAC Inc. | Strategic HVAC Inc. | 15 Black Diamond Cres, Brampton, ON L6X 0V8 | HC 100974 24 |
| Superior Air Systems Ltd. | Superior Air Systems Ltd. | 50 Baywood Rd, Etobicoke, ON M9V 3Z3 | W99HC0842 89 |
| Tam-Kal Limited | Tam-Kal Limited | 34 Cardico Dr, Box 429, Gormley, ON L0H 1G0 | W99HC0610 91 |
| Vic's Group Inc. | Vic's Group Inc. | 41 Shorting Rd, Toronto, ON M1S 3V3 | HC0004 18 |
| York Sheet Metal Limited | York Sheet Metal Limited | 227 Westcreek Dr, Woodbridge, ON L4L 9T7 | W99HC0183 87 |
