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RATINGS CHART – WATER HEATER ® MODEL WH First Hour Ratings (gph) Model No. Storage Capacity (gal) Heat Exchanger Coil at 140° F (90°F ∆ T) at 115° F (65°F ∆ T) Heating Surface (Sq.Ft) Recommended Flow Rate Pressure Drop 156 195 254 300 215 288 348 400 15 15 15 34 6 gpm 6 gpm 7 gpm 10 gpm 4.6 ft 4.6 ft 6.8 ft 12.0 ft 110 126 160 152 174 221 20 20 20 6 gpm 6 gpm 6 gpm 8.0 ft 8.0 ft 8.0 ft WH-30 30 WH-40 40 WH-60 60 WH-80 80 Double wall coil models WH-40 D 40 WH-60 D 60 WH-80 D 80 SLANT/FIN CORPORATION, Greenvale, NY 11548 • Phone: (516) 484-2600 FAX: (516) 484-5921 • In Canada: Slant/Fin LTD/LTEE, Mississauga, Ontario www.slantfin.com ©Slant/Fin Corp. 2007
