- Air Control Heating Inc
- Air Management Heating Cooling
- Air Management Heating Cooling
- Anderson Sheet Metal
- Art Push & Sons Inc
- C L Linfoot Co
- C S Guenzel Co
- Cardan Sheet Metal Heating
- Central Mechanical Inc
- Dean's Flashing & Sheet Metal
- Dickinson Heating & Air Inc
- Firestone Sheet Metal Co
- JATC
- K-Mar Building Products
- Mixan Heating & Air Cond Inc
- Omaha Sheetmetal Works
- Omaha Sheetmetal Works
- Pignotti Sheet Metal Inc
- Prawl Engineering Corp
- R L Bonebright Heating & Air
- Southwark Metal Mfg Co
- Swanson Sheet Metal Works
- Swanson Sheet Metal Works
- Tracy Sheet Metal Products Inc
- Z & S Sheet Metal