FOF Inc.
- Flowcon fabric air ducts and diffusers are an alternative to sheetmetal ductwork and registers.
- http://www.fabricairducts.com/

Continental Industries, Inc.
- A manufacturer and supplier of grilles, registers, and diffursers for residential and commercial HVAC use as well as gas venting systems for hearth and HVAc use.
- http://www.continentalindustries.com/

E.H. Price Limited
- Manufactures registers, grills, diffusers, terminal units and related HVAC supplies.
- http://www.price-hvac.com/

Wood Vents Unlimited
- Provider of wood vents, grilles, grates, and registers for floor, wall and ceiling ventilation.
- http://www.woodventsunlimited.com

Cover Me Beautiful
- Suppliers of bespoke grill coverings made from MDF, metal and other woods. Also specialising in paint spray finishing and colour matching
- http://www.covermebeautiful.co.uk

Performance Air Products Inc.
- Manufacturer of thermally powered vav diffusers for room temperature control.
- http://www.pap-iaq.com

Control-a-flow diffuser
- Filtered diffuser with draft diverter feature. Product catalog, pricing and contact information included.
- http://www.controlaflow.com/

Thermal Products Corporation
- Manufacturer of thermally and electronically powered vav diffusers for air distribution.
- http://www.thermalproductscorp.com

Metalaire
- Manufacturer of HVAC air distribution products, air terminal equipment, controls, VAV terminal units, diffusers, grilles and registers.
- http://www.metalaire.com

Krueger
- Manufacturer of grilles, registers, diffusers, and VAV terminal units for commercial and industrial applications.
- http://www.krueger-hvac.com

Acutherm
- Manufactures and distributes a line of modular vav systems and thermally powered VAV diffusers for use in HVAC systems.
- http://www.acutherm.com/

J and J Register
- Manufacturer of residential, commercial, and industrial registers, grilles, and diffusers.
- http://www.jandjreg.com

Titus
- Manufacturer of grilles, registers, diffusers & terminal units.
- http://www.titus-hvac.com/

Hart and Cooley Inc
- Manufacturer of registers, grilles, diffusers, flexible duct, chimney, and gas venting products.
- http://www.hartandcooley.com