Louvers & Vents

Louvers and vents help protect commercial ventilation openings while allowing airflow for facility, HVAC, and maintenance applications. This category includes fixed louvers for weather-exposed openings, louver-damper combinations that can close an opening, and wall shutters that work with exhaust fans or supply-air intake setups.

Product Display:
Helpful Buying Guide

How to Choose Louvers and Vents

Start with the airflow function of the opening: stationary ventilation coverage, exhaust airflow, outside-air intake, or an opening that needs adjustable shutoff. Then compare the mounting style, opening dimensions, blade design, weather-management features, screening, and material described for the application.

Visual Guide

Popular examples in this category

Adjustable-Width Galvanized Louver with BirdscreenAdjustable-Width Galvanized Louver with BirdscreenWBB77154324-Inch Aluminum Modular Fixed Louver24-Inch Aluminum Modular Fixed LouverWBB77160536-Inch Aluminum Rear-Flange Wall Exhaust Shutter36-Inch Aluminum Rear-Flange Wall Exhaust ShutterWBB771613High-Velocity Rear-Flange Wall Exhaust Shutter, 42 InchHigh-Velocity Rear-Flange Wall Exhaust Shutter, 42 InchWBB771511
Use Cases

Match the product to the airflow role

Fixed louvers provide a stationary option for ventilation openings. Exhaust shutters open and close with compatible exhaust fans, while an intake shutter is intended for vertical supply-air applications. Combination louver dampers pair weather-protective front louvers with adjustable rear blades for closing an opening when needed.

How to Choose

Check size, frame, and blade configuration

Compare the required opening size and the product frame details. Options represented include fixed 24 x 24 inch louvers, fixed-height adjustable-width louvers with a 36-inch height, and flanged louvers in 30 x 24, 48 x 36, and 60 x 36 inch sizes. Frame depths and flange sizes also vary by model.

Applications

Consider wall orientation and fan setup

Wall exhaust shutters are intended for vertical exhaust installations and are compatible with direct-drive or belt-driven exhaust fans. One automatic double shutter supports one-way horizontal exhaust airflow and can be installed from vertical to a 45-degree position. The intake shutter is designed for vertical supply-air use.

Additional Information

Compare weather, screening, and material details

Fixed blades, drainable blade designs, felt blade seals, rear flanges, and flanged channel frames address different installation and weather-management needs. Rear birdscreens are included on several fixed louvers and combination assemblies. Aluminum, galvanized, and 304 stainless steel construction options are represented.

4 in.Channel frame depth

Specified on several fixed and drainable louver frames.

45°Fixed blade angle

Used on select fixed louver configurations.

24 x 24 in.Fixed louver size

Represented by a modular aluminum fixed louver.

60 x 36 in.Combination unit size

Represented by a flanged louver and damper assembly.

Comparison Guide

Compare the Main Product Types

Use the product type to narrow the selection, then confirm the listed dimensions, mounting arrangement, blade design, and application details.

Product typeBest fitKey represented features
Fixed louverCommercial ventilation openings needing stationary airflow coverage and weather protectionFixed blades; select models have drainable blades, flanged channel frames, and rear birdscreens
Combination louver damperOpenings needing weather protection plus the option to close off airflowDrainable fixed front blades; adjustable sealed rear blades; rear birdscreen; thumb-screw operation
Wall shutterFan-driven exhaust or vertical supply-air wall applicationsExhaust or intake blade action; rear-flange configurations; select fan-compatible, high-velocity, aluminum, or stainless steel options
Planning Guide

Plan the right fit before choosing

Choose by ventilation function

Fixed louver, adjustable damper, exhaust shutter, or intake shutter?

A fixed louver is suited to openings that need ongoing ventilation coverage and protection from rain and weather. Select a combination louver damper when the opening may need to be closed using adjustable rear blades. Choose an exhaust shutter for a compatible fan-driven exhaust application, or an intake shutter for bringing outside air into a building through a vertical wall opening.

  • Fixed louvers use stationary blades for ventilation openings.
  • Combination units combine fixed front louvers and adjustable rear damper blades.
  • Exhaust shutters open during fan airflow and close after the fan stops.
  • Gravity-operated intake shutters are intended for vertical supply-air applications.
Plan for weather exposure

Compare blade and closure features

For rain-management needs, drainable fixed blades are designed to direct water away from blades and down the jambs. Other fixed louvers use 45-degree blade arrangements for weather protection. Exhaust and intake shutters include features such as felt blade seals to support quieter closing and improved weather protection, while sealed rear damper blades provide tight shutoff in combination assemblies.

  • Drainable blade louvers help avoid water cascading between blades.
  • Rear birdscreens help keep birds out of ventilated openings.
  • Automatic exhaust shutters help block reverse airflow after a fan stops.
  • Combination louver dampers use thumb-screw adjustment for rear blades.
Confirm installation details

Verify dimensions, mounting, and construction

Review the stated opening size, frame depth, flange configuration, and intended orientation before selecting a model. Examples include 4-inch-deep channel frames, 1-1/2-inch flanged channel frames, rear-flange shutter designs, and a louver with 2-inch mounting flanges. Material choices include galvanized construction, aluminum assemblies, and 304 stainless steel construction for corrosion-resistant areas.

  • The adjustable-width louver has a fixed 36-inch height.
  • Selected fixed louvers are available in 24 x 24, 30 x 24, and 48 x 36 inch sizes.
  • The combination louver dampers are represented in 36-inch and 60 x 36 inch options.
  • A 12-inch stainless steel wall exhaust shutter is intended for corrosion-resistant areas.
FAQ

Common questions before buying

What is the difference between a fixed louver and a combination louver damper?

A fixed louver has stationary blades for ventilation and weather protection. A combination louver damper adds adjustable rear blades that can close the opening.

Which products include a birdscreen?

Rear birdscreens are listed on several fixed louvers and on the combination louver damper assemblies.

Can wall exhaust shutters be used with exhaust fans?

The listed wall exhaust shutters are compatible with direct-drive or belt-driven exhaust fans.

What louver option helps direct water away from the opening?

Drainable-blade fixed louvers are designed to channel water away from the blades and down the jambs.

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