HD Grant 24X24 Perforated Return PPDDR082424TB

The HD Grant PPDDR082424TB is a 24 by 24 inch perforated return air grille with an 8 inch round duct collar, for T-bar ceiling installation.

The integral round duct collar is the distinguishing feature. A plain return grille draws air from the ceiling plenum; a grille with a duct collar connects to a ducted return, drawing air from the space through a dedicated duct rather than through the ceiling void.

That distinction matters in several situations. Where the ceiling void is not permitted to be used as a plenum, because of the construction type, the presence of non-plenum-rated materials, or a code requirement, the return must be ducted. Where a specific room must be returned separately for pressure control, such as in healthcare, laboratory, or isolation applications, ducted returns are the only way to achieve it. And ducted returns avoid drawing air from the plenum, which can carry dust, insulation fibres, and odours from the void.

The 8 inch collar is the smallest in this group, and it sets the grille's airflow capacity. Return airflow through an 8 inch duct is limited, and selecting the collar size from the design airflow rather than from what is convenient to connect is what avoids a restrictive return.

Applications include commercial offices, healthcare, laboratories, and buildings with ducted return systems.

Brand

HD Grant

SKU

PPDDR082424TB

Category

Return Air Grilles

Weight

7.2 lbs

Dimensions

24.00" x 24.00" x 3.50"

Price

$115.00

Availability

In stock

Rating

0 / 5.0