| Business | Phone |
| Har-Dave 176 Exeter Rd #B, London | (519) 652-9932 |
| Hurrell Sheet Metal 1099 Florence St, London N5W 2M7 | (519) 453-6710 |
| J A Brownlee Ltd 1712 Hyde Park Rd, London N6H 5L7 | (519) 471-5710 |
| Lor-Don Ltd 1025 Elias St, London N5W 5L1 | (519) 679-2322 |
| Miller Brothers 663 Dundas St, London N5W 2Z1 | (519) 439-9611 |
| Baratta Ventilation 343 Neptune Cres, London N6M 1A9 | (519) 453-4545 |
| Fabco 488 Mccormick Blvd, London N5W 4C6 | (519) 453-9412 |
| Technicair Limited 90 Towerline Pl, London N6E 2T1 | (519) 680-7280 |
| Sun Ventilating Co Ltd 96 Meg Dr, London N6E 3T7 | (519) 685-5983 |