- Hart and Cooley
 - Manufacturer of registers, grilles, diffusers, chimney systems, and gas venting products. - Titus HVAC
- Supplies industrial and commercial air distribution equipment.
- Seiho International
- Manufactures diffusers, vents, grills and louvers.
- Louvers & Dampers, Inc.
- Custom manufacturer of louvers, dampers, and roof top equipment.
- Sunvent Industries
- Manufacturers of aluminium and metal vents.
- Dayus Register and Grille
- Manufacturing of aluminium and plastic registers and grilles.
- Airtec Products Corp
- Grilles, diffusers, and registers.
- Cape Cod Air Grilles
- Manufacturers of custom wood grilles.
- Air Performance
- Specialising in linear air diffusers and custom metal ceilings.
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