TSC Instruments Pvt. Ltd.
- Manufacturer of electrical actuators, fire and volume control dampers, HVAC control valves, magnetic drive pumps, and conveyor systems - India
- http://www.tscindia.com

Pottorff
- Offers ceiling radition dampers, fire-smoke dampers, air control products and louvers.
- http://www.pottorff-hvac.com

LR West
- Manufacturers of aluminum fan shutters, louvers, dampers, and air control products. Specializes in supply to the horticulture, nursery, poultry, equine and dairy industries.
- http://www.lrwest.com

Airtech Products, Inc.
- Manufacturer of aluminum louvers and other components for the air cooled heat exchanger and cooling tower industries. Includes actuators, axial fans, fan rings, and hail/fan guards.
- http://www.airtechproducts.com

Flextor Inc.
- Manufacturer of dampers and heavy-duty expansion joints for industrial air handling applications.
- http://www.flextor.qc.ca

MCM Steel, Inc.
- Design and manufacture of heavy duty industrial dampers and expansion joints.
- http://www.dampex.com

Louvers & Dampers
- Custom manufacturer of louvers, dampers and roof top equipment for the HVAC industry.
- http://www.louvers-dampers.com/

Arrow United Industries
- Manufacturer of industrial, commercial and multi-zone dampers. Also offers architectural louvers, walk-in doors, duct access doors, and louvered penthouses.
- http://www.arrowunited.com

Safe-Air Dowco
- Manufacturer of louvers and dampers for the commercial and industrial construction markets.
- http://www.safeair-dowco.com/

Metropolitan Air Technology, Inc.
- Manufacturers of cable operated dampers and remote control balancing dampers that are used to balance airflows in hard ceilings. Offers a listing of client projects and an overview of products.
- http://www.rototwist.com/

NCA International Group
- Manufacturer of louvers and dampers for commercial and light industrial applications.
- http://www.ncamfg.com/

Cesco Products
- Manufacturer of air ventilation and control products for the heating, ventilating and air conditioning industry including dampers, louvers, vents, and doors.
- http://www.cescoproducts.com/