| Business | Phone |
| 21 Degrees Heating Air Cond 1652 Woodward Dr, Ottawa K2C 3R8 | (613) 723-5500 |
| A J Air Systems Ltd 111 Scrivens St, Ottawa K2B 6H3 | (613) 728-1743 |
| Airco Refrigeration 505 Industrial Ave #4, Ottawa K1G 0Z1 | (613) 739-8186 |
| Airmetrics Energy Systems Inc 60 Beech St, Ottawa K1S 3J6 | (613) 235-8732 |
| Al Bradley Heating & Air Cond 1851 Bromley Rd, Ottawa K2A 1B8 | (613) 722-8946 |
| Groupe Master 1250 Old Innes Rd #522, Ottawa K1B 5L3 | (613) 741-4455 |
| Honeywell Limitee 1682 Woodward Dr, Ottawa K2C 3R8 | (613) 228-3610 |
| Ilott Mechanical Contracting 124 O'Connor St, Ottawa K1P 5M9 | (613) 233-6568 |
| Mike's Appliance 293 1/2 Carruthers Ave, Ottawa K1Y 1P1 | (613) 237-3232 |
| P O'Brien Mechanical Svc Ltd 44 Chamberlain Ave, Ottawa K1S 1V9 | (613) 230-7590 |
| Parent Heating & Cooling Inc 2615 Lancaster Rd #21, Ottawa K1B 5N2 | (613) 739-4515 |
| Parson Refrigeration (1985) Ltd 37 Capital Drive, Ottawa K2G 0E7 | (613) 232-1171 |
| Pro-Cool Co Ltd 5 Fairmont Ave, Ottawa K1Y 1X4 | (613) 722-2950 |
| Quemar Refrigeration 1565 Chatelain Ave, Ottawa K1Z 8B6 | (613) 725-9376 |
| Ralph E Brown Refrigeration 1565 Chatelain Ave, Ottawa K1Z 8B6 | (613) 729-2391 |
| Ref-Tech Mechanical Svc Ltd 82 Topley Cres, Ottawa K1G 4M6 | (613) 737-6613 |
| Rogers Home Heating Inc 160 Elm St, Ottawa K1R 6N5 | (613) 230-1047 |
| Baxtec Mechanical Svc 2450 Lancaster Rd #29, Ottawa K1B 5N3 | (613) 738-7450 |
| Bi-Mechanical Svc Ltd 2627 Edinburgh Pl #46, Ottawa K1B 5M1 | (613) 748-9665 |
| Blair's Mechanical Inc 311 Richmond Rd #G, Ottawa K1Z 6X3 | (613) 794-6163 |
| York Applied Systems 1120 Morrison Dr, Ottawa K2H 8M7 | (613) 596-9111 |
| Sgb Technology 2285 St Laurent Blvd #B17, Ottawa K1G 4Z5 | (613) 731-6109 |
| Standard Mechanical Systems 1755 Woodward Dr #300, Ottawa K2C 0P9 | (613) 233-9040 |
| Temviron Air Conditioning Inc 1733 Woodward Dr, Ottawa K2C 0P9 | (613) 727-6353 |
| Trane Ottawa 1024 Morrison Dr, Ottawa K2H 8K7 | (613) 820-8111 |
| Waltek Energy Svc Inc 1181 Newmarket St, Ottawa K1B 3V1 | (613) 742-1500 |
| Breck-Mar Sales & Svc Ltd 877 Boyd Ave, Ottawa K2A 2E2 | (613) 728-0060 |
| Breneck Technical Svc 344 Churchill Ave N, Ottawa K1Z 5C1 | (613) 728-4854 |
| Cig Heating & Air Condg Ltd 1798 Woodward Dr, Ottawa K2C 0P7 | (613) 226-6806 |
| Cvs National Corp 2720 Queensview Dr, Ottawa K2B 1A5 | (613) 596-9639 |
| Comfort Solution 58 Douglas Ave, Ottawa K1M 1G2 | (613) 746-4370 |
| Comfy Air 1550 Michael St, Ottawa K1B 3T7 | (613) 741-5222 |
| Dirtek 2562 Iris St, Ottawa K2C 1E1 | (613) 721-2105 |
| Energy Centre 1181 Newmarket St, Ottawa K1B 3V1 | (613) 746-7000 |
| Flemec Limited 878 Boyd Ave #B, Ottawa K2A 2E3 | (613) 761-1428 |
| Perfect Combustion 575 Wolffdale Cres, Ottawa K1K 1N6 | (613) 745-7826 |