Louvers for Ventilation, Air Intake, Air Exhaust

Allow air into your building while prohibiting water and debris. There are several levels of water protection available, so you can use our Guide to determine the most cost effective solution for your application.

From this page, you can access technical information, specifications, and drawings for aluminum wall louvers.

2 storm blade louver 4 storm blade louver 6 drainable blade louver wind driven rain louvers

Louver Selection

In selecting louvers and vents, consideration for your application is critical to your project success. Metal louvers are designed to allow air into the building while keeping out unwanted elements. Improper louver selection may lead to water leakage.

To assist with product selection, each louver model is listed below with optional selections by application, free area, or cost. If you are looking for products not listed, call us. We also offer louvered equipment screens and sunshades made from aluminum with various finishes to fit your project requirements.

What if I want more rain protection?

Gain the utmost protection against water penetration by using one of our Wind Driven Rain Louvers. These louvers will protect your building from water damage, even under heavy wind and rain conditions.

What if I have high wind loads?

Any of our louvers can be modified to handle higher wind loads (within limits). However, if you are in Florida or other coastal states with hurricane force winds, use one of our Hurricane Louvers to gain the highest levels of protection.

Louvers are commonly specified in project documents under these divisions:
08 90 00 Louvers and Vents (sometimes listed as 08 9000, 089000)
08 91 00 Louvers (sometimes listed as 08 9100, 089100)
08 91 19 Fixed Louvers (sometimes listed as 08 9119, 089119)

Please use the navigation to the right to select the louver model that suits your requirements. Details of the specific model will be displayed for each selection. Or...

Use our Louver Application Guide Below to select a louver model:

Louver Application Louver Type Model
Decorative, Air Exhaust, Ventilation Standard Blade Louvers E2JS E4JS
Highest Free Area (69%) Narrow Blade Louvers E6JN
Lower Pressure Drop, High Air Exhaust Velocity Standard Blade Louvers (Performance Series) E4JP E6JP
Air Intake or High Wind Areas Drainable Blade Louvers E2DS E4DS
Air Intake, High Wind, Low Pressure Drop, High Air Intake Velocity Drainable Blade Louver (Performance Series) E4DP E6DP
Extreme Weather, Air Exhaust or Open Ventilation Wind Driven Rain Louver E4WS
Extreme Weather, Extreme Intake Air Velocity Wind Driven Rain Louver E2WV E4WH E6WH
Extreme Wind, Decorative, Air Intake and Exhaust Hurricane Standard Blade Louver E6JF
Extreme Wind, Extreme Weather Hurricane Wind Driven Rain Louver E6WF

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Select the fixed louver model by free area:

Table is based on a test size of 48" wide x 48" high for comparison purposes:

Product Model Free Area First Point of Water Penetration (free area velocity) Overall Performance (C.F.M.) Pressure Loss at this velocity (inches water gauge)
E6JN 69.1% 915 fpm 9014 cfm 0.12
E4DP 59.3% 930 fpm 8826 cfm 0.12
E4JP 58.4% 960 fpm 8976 cfm 0.13
E6DP 57.7% 1046 fpm 9655 cfm 0.13
E6JP 57.3% 1123 fpm 10298 cfm 0.18
E4DS 56.0% 930 fpm 8333 cfm 0.13
E4WS 56.0% 346 fpm 3100 cfm 0.02
E6JF 54.4% 1020 fpm 8884 cfm 0.18
E2WV 53.8% 889 fpm 7645 cfm 0.24
E6WH 51.4% >1250 fpm 10275 cfm 0.21
E6WF 51.1% 1081 fpm 8832 cfm 0.14
E4WH 50.6% >1250 fpm 10113 cfm 0.25
E4JS 50.4% 888 fpm 7157 cfm 0.15
E2DS 49.4% 889 fpm 7032 cfm 0.12
E2JS 48.7% 725 fpm 5648 cfm 0.08

What does all this data mean?

Read more about Louver Free Area

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Select the fixed louver model by price:

Product Model Price Compare*
E4JS Least Expensive
E2JS 5% more than E4JS
E4DS 10% more than E4JS
E2DS 10% more than E4JS
E4WS 12% more than E4JS
E4JP 15% more than E4JS
E4DP 25% more than E4JS
E6JP 30% more than E4JS
E6DP 35% more than E4JS
E6JF 35% more than E4JS
E6JN 40% more than E4JS
E2WV 50% more than E4JS
E4WH 95% more than E4JS
E6WH 120% more than E4JS
E6WF 125% more than E4JS

*Price values are for comparison purposes only. Actual quotation prices may vary depending on the sizes required and the options selected.

Consider these other factors:


Suggestion: Model E2JS, E4JP, E6JP

The louver appearance should play a significant role in louver selection. It is often ignored in favor of "function over form". However, with so many high performance louvers available the appearance can now be a major consideration. For example, if your louver heights are small, you will want a narrow blade spacing. This will allow more blades in the frame and improve the appearance.

Special shapes:

Suggestion: Model E4JP

Use non-drainable louvers (models with J blades)- To view common special shapes click here. Use narrow blade spacings so the appearance will be more uniform (especially in short height louvers). Use high free area louvers - many of the special shapes have restricted free areas due to angles or rounding. A higher free area louver will help combat this loss of free space. E4JP, E6JP, E6JN

Review the impact of special shapes on Louver Free Area

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