Greenheck NYD - Manuals

2 Model NYD & NYB Standard Construction Features Greenheck’s model NYD and NYB tamper-resistant centrifugal roof exhaust fans provide the industry’s best performance and durability for general clean air applications where tamper resistance is required. • Performance as cataloged is assured. All ...

3 Model NYD & NYB Options and Accessories Dampers - Gravity and motorized dampers are designed to prevent outside air from entering back into the building when the fan is off. Damper sizes are shown on the performance pages. Disconnect Switches - A wide selection of NEMA rated switches are avail...

4 Dimensional Data & Model Number Code Model Number Code The model number code is designed to completely identify the fan. The correct code letters must be specified to designate the correct construction. The remainder of the model number is determined by the size and performance. NYD - 120 - A ...