| Business | Phone |
| Bonboiler Plant Equipment 300 Fox Chapel Rd, Pittsburgh 15238 | (412) 799-0894 |
| Enviro-Therm Inc 420 Grant Ave, Pittsburgh 15209 | (412) 821-3800 |
| Philips Heating & Cooling 19 Mitchell Dr, Pittsburgh 15241 | (412) 835-0727 |
| Weil-Mc Lain Co 2 Penn Ctr W, Pittsburgh 15276 | (412) 788-9345 |