| Business | Phone |
| Air Separation Technologies 2240 Argentia Rd, Mississauga L5N 2X6 | (905) 821-8860 |
| Air Control Technology 36 Hawkestone Rd, Mississauga L5C 2V2 | (905) 949-4747 |
| Industrial Ventilation Systems 2450 Anson Dr, Mississauga L5S 1G2 | (905) 672-6334 |
| Markham Engineering Inc 3120 Glen Erin Dr #2, Mississauga L5L 1R6 | (905) 828-2002 |