plenum fan

plenum fan

A backward-curved airfoil impeller that is housed in a rectangular plenum; has ducted inlet and outlet connections; it is not enclosed in a typical volute scroll.
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plenum fans; direct-drive plenum fan with EC motor versus FEG 71 rated impeller; VFD data retrieved from AHRI certification directory in March 2016; 7.
Another popular energy-saving Trane feature is eDrive direct-drive plenum fan technology, which is up to 20 percent more efficient than traditional forward-curved fans," he adds.
The new Direct-Drive Plenum fan provides static efficiency improvements of 15-20 percent vs.
FAN TYPE AIRFLOW FAN WORK ANNUAL WORK (CFM) (W) (KWH) Twin FC Scrolled Fans 10,000 6,833 59,860 Twin AF Scrolled Fans 10,000 5,655 49,535 Belt Drive Plenum Fan 10,000 5,252 46,006 Direct Drive Plenum Fan 10,000 4,939 43,261 FAN TYPE ANNUAL COST ($) Twin FC Scrolled Fans 5,986 Twin AF Scrolled Fans 4,953 Belt Drive Plenum Fan 4,601 Direct Drive Plenum Fan 4,326 TABLE 5 Casing savings.
Optional fan arrangements include airfoil scrolled fans, and belt and direct drive plenum fans.
The direct drive plenum fans also offer reduced maintenance (no belts) and the ability to vary the supply airflow for further energy savings (depending on the building application).
Using a plenum fan is one method that aids in accomplishing this goal.
The company offers a wide range of high-quality industrial fans, blowers, and motors including Axial fans, Centrifugal blowers, Plug fans, Plenum fans, Single and Double Inlet fans, with both AC and EC motors.
A FANWALL is an array of smaller, high-efficiency airfoil plenum fans.
The major packaged and custom CRAH manufacturers all offer plenum fans, which eliminates this issue.
Authors: While plenum fans are possible from most manufacturers it is still common to see CRAHs implemented using forward curve fans.