| Business | Phone |
| A Air Conditioning Kool 151 Morningdale Cres, Waterloo N2V 1E5 | (519) 746-8173 |
| Aaa Air Conditioning Inc 60 Rankin St, Waterloo N2V 1V9 | (519) 747-9051 |
| Action Air Conditioning & Refr 79 Rankin St #3, Waterloo N2V 1W2 | (519) 747-5240 |
| Al Dunn Heating & Air Cond 75 Rankin St, Waterloo N2V 1W2 | (519) 767-0965 |
| All Weather Air Systems 163 Northlake Dr, Waterloo N2V 1B7 | (519) 884-1705 |
| K W Mechanical Inc 225 Bathurst Dr, Waterloo N2V 2E4 | (519) 884-0589 |
| Lennox Industries Ltd 115 Randall Dr, Waterloo N2V 1C5 | (519) 886-3666 |
| Napoleon Home Comfort 620 Davenport Rd, Waterloo N2V 2C2 | (519) 725-2440 |
| Olheiser Heating & Air Cond 627b Albert St, Waterloo N2L 3V5 | (519) 725-1004 |
| Rcr Design Air Inc 231 Labrador Dr, Waterloo N2K 4M8 | (519) 885-2110 |
| Reitzel Heating & Air Cond 665 Superior Dr, Waterloo N2V 2C8 | (519) 884-3510 |
| Triak Mechanical Inc 295 Westvale Dr, Waterloo N2T 2B2 | (519) 888-0886 |
| Waterloo Home Products 100 Frobisher Dr #11, Waterloo N2V 2A1 | (519) 747-9821 |
| Cronin--Emery Mechanical 826 King St N, Waterloo N2J 4G8 | (519) 658-5330 |
| Delta Air Systems 584 Colby Dr #2, Waterloo N2V 1A2 | (519) 885-2740 |
| Elite Air Inc 490 Dutton Dr #B4, Waterloo N2L 6H7 | (519) 747-3502 |
| Air Expert Home Comfort Inc. 4-160 Frobisher Drive, Waterloo N2V 2B1 | (519) 884-7676 |