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Bosch WR400-7K On Demand DHW Heater Page
Our most popular BOSCH model - suitable for everyday residential or commercial/industrial hot water heating needs. Flow controlled, this modulating unit combines high efficiency with high output, plus low minimum flow rate. Output temperature may be preset to any level between 90F and 140F and the selected temperature will be maintained indefinitely (plus or minus 5F). The WR400-7K is equipped with an internal micro hydro generator instead of either the standing pilot - as on the WR400-1K or the electronic ignition powered by 2 "D" cell batteries - as on the WR400-3K (no batteries to go dead).
Who Should Own One?
Technical Specifications:
Fuel Types Available: Natural Gas, Propane
Rated Input (BTU/hr.): 117,000
Minimum Input (BTU/hr.): 33,000
Thermal Efficiency/Energy Factor: 82% / .80
Fuel Consumption: 30.6 to 108.8 (CuF/hr) NG /
1.5 to 5.4 (lbs/hr) LP
Ignition Type: micro hydro generator
Max flow rate at 45F temp rise (GPM) 4.0
Max flow rate at 100F temp rise (GPM)    1.8
Minimum Flow Rate (GPM) 0.5
Dimensions 30 5/16" x 17 5/16" x 8 11/16"
Shipping Weight 44 lbs.
Flue Size 5"
Water Inlet & Outlet (NPT) 1/2 inch
Gas Inlet (NPT) 1/2 inch
Water Pressure Range 13 - 150 psi
Inlet Pressure Required 11 inches W.C. LP /
7 inches W.C. NG
NG & LP On Demand Boilers Natural Gas & Propane On Demand Boilers & DHW Heaters
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No Utility Bills Inc. All rights reserved. Last modified: 10/19/24