Metalration Inc.
- Cast iron vents and vent covers for ventilating the crawlspace of homes or commercial buildings. USA
- http://www.metalration.com

Rytons
- UK supplier of ducting, vents, ventilators, and related hardware for rooms, soffits, roofs, and cavities. Includes product catalog.
- http://www.rytons.com

Colt International Limited
- Manufacturers of louvre systems, smoke control, solar shading, air handling. UK
- http://www.coltgroup.com/

Osborne-Hume Grilles and Louvres Ltd
- Suppliers of ventilation and sun louvres, grilles, and ready made inspection hatches. New Zealand
- http://www.osborne-hume.co.nz

Sunvent Industries
- Manufacturer of anodized aluminum brick vents for wall ventilation. Product catalog and contact information. USA
- http://www.sunventindustries.com

L & L Louvers
- Manufacturer of wall and door louvers, grills, screens, and penthouses in steel, stainless steel and aluminum. USA
- http://www.louver1.com

Airolite Company
- Manufacturer of louvers, grilles, screens and sun control products. USA
- http://www.airolite.com

Architectural Louvers Co.
- Manufacturer of wall louvers specializing in architectural shaped, decorative, and storm resistant products. Also offers decorative grilles, equipment screens, and vision barriers. Product catalog and application information. USA
- http://www.archlouvers.com

Levolux
- Design and manufacture of manual, motorized and automated bespoke architectural solar shading and ventilation louvres. UK
- http://www.solar-shading.co.uk

Louvresol
- Architectural solar shading and screening louvre products. Works with building design and architectural firms to enhance product design and capability. UK
- http://www.louvresol.com

Air Flow Company
- Manufacturer of louvers, dampers, architectural grilles, architectural and mechanical equipment enclosures and sun shading for a variety of custom designs. USA
- http://www.airflowco.net

Midget Louver
- Aluminum louvers and vents for precision and laboratory instruments, renovation projects, computer and electronic equipment, air conditioning and refrigeration. USA
- http://www.midgetlouver.com

ASCA, Inc.
- Manufacturer of architectural louvered sunshades, screening devices, light shelves and natural daylighting systems. USA
- http://www.asca-design.com

Kingfisher
- Offers ventilation and weather louvre systems, solar shading systems, and roof lights. UK
- http://www.kingfisherlouvres.com/

Louvre Company
- Architectural products includes information on louvres, roof glazing and aluminium fabrications. Ireland
- http://www.louvrecompany.ie/

Juskor Enterprises
- Supplier of louvers, vents, penthouses, and architectural grilles. Florida
- http://www.juskor.com/

Smart Vent
- Foundation flood vents use hydrostatic pressure to minimize damage during flooding. Flood vent certified by the ICC. USA
- http://www.smartvent.com/

Maurice Franklin Louver Co., Inc.
- Offers a variety of aluminum and plastic louvers designed to ventilate and reduce moisture in both home and industrial environments. USA
- http://www.mflouver.com

The Whitfield Group, Inc.
- Specializes in custom designed hand-made wooden ventilation louvers for new or remodeled homes and apartment buildings. USA
- http://whitfieldwoodproducts.com

Air-Therm Inc.
- Design, manufacture, and install industrial gravity ventilation equipment and inlet louvres for process type buildings. Product and technical data. Quebec
- http://www.air-therm.com/

Bayliss Autovents
- Specialist vents which open and close automatically using energy from the warmth of the sun or the surrounding air. The vent opens wider with increased heat. UK
- http://www.mywebpage.net/autovent

Industrial Louvers
- Manufacturer of louvers, vents, equipment screens, decorative grilles, column covers, and beam wraps to fit design or construction requirement. USA
- http://www.industriallouvers.com/