| Business | Phone |
| Airwaves Heating & Air Cond Po Box 3321, Gresham 97030 | (503) 491-8804 |
| Clawson Heating & Air Cond 2402 Nw Birdsdale Ave, Gresham 97030 | (503) 618-9646 |
| Rnr Heating Venting & Air Gresham 97030 | (503) 618-7678 |
| Performance Mechanical Htg 1915 Sw 25th St, Gresham 97080 | (503) 492-5605 |
| Fitzpatrick Heating 360 Sw Nancy Ave, Gresham 97030 | (503) 665-3021 |
| Multnomah Heating 4917 Se Chase Rd, Gresham 97080 | (503) 665-5656 |
| Mac's Furnace Co 6920 Se 267th Ave, Gresham 97080 | (503) 663-5538 |