HD Grant 24X24 Perforated Return PPDDR162424TB

The HD Grant PPDDR162424TB is a 24 by 24 inch perforated return air grille with a 16 inch round duct collar, for T-bar suspended ceiling installation.

At 16 inches the collar is approaching the practical limit of what a 24 by 24 inch module can accommodate, and the grille correspondingly handles a high return volume. This size is specified where the number of available ceiling positions is limited relative to the return airflow required, typically in open plan floors, large retail areas, and spaces where the ceiling layout constrains where returns can be placed.

A consideration specific to large collars in a fixed face module is that the perforated face area, not the collar, ultimately governs face velocity and generated noise. A large collar delivers a high volume of air to the back of the grille, but that air must still pass through the same 24 by 24 inch perforated plate. Pushing airflow beyond what the face area can pass quietly produces a grille that is audible in an otherwise quiet space, and no amount of collar capacity compensates for that.

Checking the manufacturer's published free area and noise criteria data against the design airflow is the way to avoid it.

Applications include commercial offices, retail, education, and healthcare suspended ceilings. Confirm the grid module and duct connection size before ordering.

Brand

HD Grant

SKU

PPDDR162424TB

Category

Return Air Grilles

Weight

8.2 lbs

Dimensions

24.00" x 24.00" x 3.50"

Price

$152.00

Availability

In stock

Rating

0 / 5.0