Pick the right louver.
Three ways to choose: by what's on the other side of the wall, by free area, or by price.
A.
By application
If you know what the louver is protecting and where the wind comes from, start here.
Jump to matrix →B.
By free area
If your wall opening is fixed and you need to push X CFM through it, start here.
See performance table →C.
By cost tier
If budget drives the spec, see relative price tiers below — then call us for an actual quote.
Jump to pricing →Method A
Application → louver type → model.
Pick the row that best describes your application. The matrix narrows you to a blade type and a handful of model codes.
| If your application is… | Blade type | Models |
|---|---|---|
| Decorative, exhaust, general ventilation | Standard blade | E2JS · E4JS · E6JS |
| Highest free area (69%) | Narrow blade | E6JN |
| High exhaust velocity, low pressure drop | Performance standard | E4JP · E6JP |
| Air intake, high wind areas | Drainable blade | E2DS · E4DS |
| Air intake, low pressure drop, high velocity | Performance drainable | E4DP · E6DP · E6DF |
| Extreme weather — exhaust / open ventilation | Wind-driven rain | E4WS |
| Extreme weather — extreme intake velocity | Wind-driven rain | E2WV · E4WH · E6WH |
| Hurricane-rated air intake & exhaust | Hurricane standard | E6JF |
| Hurricane-rated extreme weather | Hurricane wind-driven rain | E6WF |
Method C
Relative price tiers.
For comparison only — actual quotes vary with size and options. E4JS is the baseline.
| Model | Relative to E4JS |
|---|---|
| E6JS | −5% (less expensive) |
| E4JS | Base price |
| E2JS | +5% |
| E4DS · E2DS | +10% |
| E4WS | +12% |
| E4JP | +15% |
| E4DP | +25% |
| E6JP | +30% |
| E6DP · E6JF | +35% |
| E6DF | +38% |
| E6JN | +40% |
| E2WV | +50% |
| E4WH | +95% |
| E6WH | +120% |
| E6WF | +125% |
Ready to spec your project?
Still not sure?
Send us the project — the weather, the wall, the airflow target — and we'll narrow to one model on the first call.