| Business | Phone |
| Acclaim Heating & Air Cond 4525 W Dean Rd, Milwaukee 53223 | (414) 354-5910 |
| Parker Computerized Damper 2935 W Silver Spring Dr, Milwaukee 53209 | (414) 463-1234 |
| Design Air 326 W Florida St, Milwaukee 53204 | (414) 276-6877 |
| Energy Savr Products Inc 3868 N Fratney St, Milwaukee 53212 | (414) 963-3030 |
| Gustave A Larson Co 1215 W Saint Paul Ave, Milwaukee 53233 | (414) 273-1838 |
| Lennox Industries Inc 3930 W Burnham St, Milwaukee 53215 | (262) 549-4446 |
| Whesco Group Inc 9046 N 51st St, Milwaukee 53223 | (414) 365-5500 |
| Williamson-Thermoflo 8201 W Calumet Rd, Milwaukee 53223 | (414) 354-2935 |
| Sid Harvey Midwest Inc 4750 N 124th St, Milwaukee 53225 | (414) 462-0900 |