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Commercial Gas High Efficiency Water Heater eF Series®Additional Equipment Features: Three Pass Heat Exchanger System—The three pass Factory Installed Hydrojet®Sediment Reduction Heat Exchanger system keeps the hot combustion gases System—Cold water inlet sediment reducing device helps moving at a high velocity.The combination of high prevent sediment build up in tank. turbulence and velocity causes an enormous rate of heat transfer into the water. Water Connections—Factory installed true dielectric waterway fittings extend water heater life and eases Submerged Combustion Chamber—Submerging the installation. combustion chamber in the center of the water storage tank minimizes radiant heat loss and improves efficiency. Hand Hole Cleanout—Allows inspection of tank interior and facilitates the removal of sediment deposits. Zero Inch Clearance—The eFSeries,jacket is cool to the touch and is approved for zero inch clearance to E.C.O.—A manual re-set Energy Cut Off(E.C.0)shuts off all combustibles for unsurpassed installation flexibility. gas in event of an overheat condition. The ECO is manually resettable. VitraglasO Lining—Bradford White tanks are lined with an exclusively engineered enamel formula that provides Non-CFC Foam Insulation—Covers the sides and top of superior tank protection from the highly corrosive effects of tank, reducing the amount of heat loss. This results in less hot water. This formula(Vitraglas�) is fused to the steel energy consumption, improved operation efficiencies and surface by firing at a temperature of over 1600°F(8711C). jacket rigidity. Magnesium Anode Rods—Each eF Series®model has multiple anodes to provide added protection against corrosion for long trouble-free service(EF100T399 has one powered anode rod and 2 magnesium anode rods). EF-60T-150 EF-60T-199 EF-60T-125 EF-100T-150 EF-10OT-199 Power Power Power Power Power Power 2"Vent Pipe Direct Vent Vent Direct Vent Vent Direct Vent Vent Max.Intake Length 15 ft. N/A 15 ft. N/A 15 ft. N/A Max.Exhaust Length 15 ft. 30 ft. 15 ft. 30 ft. 15 ft. 30 ft. EF-60T-125 EF-60T-150 EF-60T-199 EF-10OT-150 EF-100T-199 EF-10OT-250 EF-10OT-300 EF-100T-399 Power Power Power Power Power Power Power Power Power Power 3"Vent Pipe Direct Vent Vent Direct Vent Vent Direct Vent Vent Direct Vent Vent Direct Vent Vent Max.Intake Length 60 ft. N/A 50 ft. N/A 40 ft. I N/A 30 ft. N/A 25 ft. N/A Max.Exhaust Length 60 ft. 120 ft. 50 ft. 100 ft. 40 ft. 80 ft. 30 ft. 60 ft. 25 ft. 50 ft. EF-60T-125 EF-60T-150 EF-60T-199 EF-100T-150 EF-1007-199 EF-10OT-250 EF-100T-300 EF-100T-399 Power Power Power Power Power Power Power Power Power Power 4"Vent Pipe Direct Vent Vent Direct Vent Vent Direct Vent Vent Direct Vent Vent Direct Vent Vent Max.Intake Length 85 ft. N/A 75 ft. N/A 65 ft. N/A 55 ft. N/A 50 ft. N/A Max.Exhaust Length 85 ft. 170 ft. 75 ft. 150 ft. 65 ft. 130 ft. 55 ft. 110 ft. 50 fl. 100 ft. Air intake Cannot exceed exhaust by more than 30 ft.in any venting situation.Subtract 5 ft.for each additional 90°elbow. eF Series® Optional Equipment Features: Concentric Vent Kit Termination-3" termination fitting provides for only one exit opening through wall or roof Maxitrol Gas Pressure Regulating valve—Ensures proper (p/n 239-44069-01). supply pressure to eF unit of 7" to 11" W.C. (provided incoming pressure is between 1/2 and 2 psi).This can be Intake/ ordered as a separate art, or as art of the heater. For Combustion P P P Rain Cap, the separate part, please use p/n 243-45517-00. Part is included with EF100T399 model. vent Exhaust NSF Compliance Kit—p/n 265-44542-04. �. Low Gas Inlet Pressure Option—Pre-assembled to allow operation at lower inlet natural gas pressure 361/" (down to 3.5" w.c.). p/n 239-44069-01 p/n 239-44069-02 (for 2" vent pipe only)