In addition, Greenheck redesigned model CRD-1WT with a side inlet or outlet duct connection which provides the ability to control air volume and allows for easier installation. Both models are approved for the following ceiling designs in the UL Fire Resistance Directory: L528, L546, L558, L562, L574, L576, L581, L583, L585, L592, M501, M503, M508, P533, P538, P545, P547, P548, and P554.
Watch the video below featuring the CRD-1WT and CRD-2WT for more information.