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DETAILS
Shipping Cutoff Times
| Shipping Type | Order By |
|---|---|
|
Standard Ground Small Parcel FREE - On orders over $25 View Transit Map |
7:00 PM CST |
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Next Day Air (Calculated at checkout) |
3:00 PM CST |
|
Standard Ground Freight FREE - On orders over $25 |
1:00 PM CST |
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Warehouse
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Axial Wall Exhaust Fan (Models SBE, SE1)
Designed to move high volumes of air at low static pressure.
Stationary Extruded Aluminum Louver (Model ESD-635DE)
Designed to protect air intake and exhaust openings in building exterior walls.
Propeller fans are ideal for ventilating high volumes of air at low static pressure, like warehouse spaces. Typically, a louver is installed at one end of building drawing fresh air in, while a sidewall propeller fan is installed at the opposite end, exhausting the stale air out of the warehouse space.
In warehouse application, it is typically recommended that air be changed every 5-10 minutes. To properly size the exhaust fan, first determine the volume of your space: For example:
25'L x 25'W x 20'H = 12,500 ft3
12,500 ft3 / 7.5 minutes per air change
1,666 CFM
*NOTE - Your intake louver should be sized to supply the same amount of air that your sidewall fan is exhausting.
The pressure generated by fans in ductwork is very small. Yet, accurately estimating the static pressure is critical to proper fan selection. Fan static pressure is measured in inches of water gauge. One pound per square inch is equivalent to 27.7 in. of water gauge. Static pressure in fan systems are typically less than 2 in. of water gauge, or 0.072 Psi.
The amount of static pressure that the fan must overcome depends on the air velocity in the ductwork, the number of duct turns (and other resistive elements), and the duct length. For properly designed systems with sufficient make-up air, the guidelines in the table can be used for estimating static pressure.
Static Pressure Guidelines | |
| Non-Ducted: | 0.05 inches to 0.20 inches |
|---|---|
| Ducted: | 0.2 inches to 0.4 inches per 100 feet of duct (assuming duct air velocity falls within 1,000-1,800 feet per minute) |
| Fittings: | 0.08 inches per fitting (elbow, register, grille, damper, etc.) |
| Important: Static pressure requirements are significantly affected by the amount of make-up air supplied to an area. Insufficient make-up air will increase static pressure and reduce the amount of air that will be exhausted. Remember, for each cubic foot of air exhausted, one cubic foot of air must be supplied. | |
