Centrifugal Roof Exhaust Fans Models NYD and NYB Direct and Belt Drive August 2008
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 fan sizes are tested in our AMCA Accredited Laboratory and all models are licensed to bear the AMCA Air Performance seal.
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 available for positive electrical shutoff and safety, including dust-tight, rainproof and corrosion-resistant. Switches may be internally or externally mounted.
Dimensional Data & Model Number Code B C A 2 1/2 in.
Performance Data NYD - Direct Drive Models 1.4 300 250 200 10 0- A 1.0 NY 0.8 0.6 D- 0.4 50 0.2 0 0.0 0 90 NY -A D-1 -A 75 100 D- 1.2 D- 150 NY NY D- 300 00- B 400 1.6 350 1.4 300 250 200 150 900 1200 1500 1800 D- 0.2 0.0 0 0- A -14 0.6 0 12 NYD 0.8 50 2100 NY 1.0 0.4 -B RPM Density 0.075 lb/ft³ 1.2 100 90 600 Static Pressure in. wg 350 Static Pressure Pa 1.6 Static Pressure in. wg 400 1.8 RPM Density 0.075 lb/ft³ NY Static Pressure Pa 1.
Performance Data Model NYB-100 & NYB-140 1.2 UR VE IS SY ST EM C TH OF E Static Pressure in. wg Static Pressure Pa CU RV E EM ST SY HI S FT LE FT O E O TO TH TH T TO T L SE E C 400 600 800 1000 1200 1400 0 0.
Performance Data Model NYB-180 & NYB-240 1.4 4 2 250 1.0 1 TH IS S YS T 76 0 82 5 0 FT OF 0.6 94 0.4 70 64 0 0 150 100 0.8 0.6 1/ 2 1/ 3 0.2 0.0 0 DO T NO 500 S hp 0.4 1500 2000 2500 3000 3500 4000 4500 50 0.2 0 0.
Exhaust Fans The spun aluminum downblast centrifugal roof exhaust fan models G and GB (direct or belt drive) are an economical means of exhausting air. They utilize a backward-inclined wheel and are available in 45 different sizes. Capacities range from 50 to 44,700 cfm and up to 3.25 in. wg of static pressure. The low silhouette fabra style downblast centrifugal roof exhaust fan Series L models LD and LB (direct or belt drive) are a low profile and architectural means of exhausting air.
