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BOSCH Tankless Water Heaters - Models & Pricing



Model WR400-1K

Our most popular BOSCH model - a solid workhorse suitable for most everyday whole house 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). This unit is suitable for single family residential or commercial/industrial applications.



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% / .69
Fuel Consumption: 30.6 to 108.8 (CuF/hr) NG /
1.5 to 5.4 (lbs/hr) LP
Ignition Type: piezo with pilot
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



WR400-3K(B)

Same as WR400-1K except it is equipped with an electronic ignition powered by 2 "D" cell bateries instead of a standing pilot - it will keep on operating even in the event of a power failure!



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: electronic (2 normal "D" cell batteries)
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



Model WR400-7K

Same as WR400-1K except it is activated by an internal micro hydro generator instead of a standing pilot - it will keep on operating even in the event of a power failure!



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: flow activated internal 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



Model WR400-5K

Especially designed with 40% less flow resistance for commercial and industrial high volume steady-flow applications. They are ideal for pump recirculation with storage, and for radiant floor heating systems.



Technical Specifications:

Fuel Types Available: Natural Gas, Propane
Rated Input (BTU/hr.): 117,000 NG
Minimum Input (BTU/hr.): 58,500
Thermal Efficiency: 82%
Fuel Consumption: 54.3 to 108.8 (CuF/hr) NG /
2.7 to 5.4 (lbs/hr) LP
Ignition Type: Piezo with pilot
Max flow rate at 45F temp rise (GPM) 4.0
Max flow rate at 100F temp rise (GPM)    1.8
Minimum Flow Rate (GPM) 1.8
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 8 - 150 psi
Inlet Pressure Required 11 inches W.C. LP /
7 inches W.C. NG



Model WR430-3KV

BOSCH's most powerful unit with 130,000 BTU (Natural Gas Model). Comes complete with a built-in corrosion resistant, whisper quiet power venter and electronic ignition. Allows you to vent 15 feet horizontally to an outside wall without special venting materials. Comes with extention terminal complete with anti draft-back flapper, and 36 inch power cable and plug. Suitable for same applications as WR400-1K.


Model WR430-3KV

Technical Specifications:

Fuel Types Available: Natural Gas, Propane
Rated Input (BTU/hr.): 125,000 LP / 130,000 NG
Minimum Input (BTU/hr.): 28,000
Thermal Efficiency/Energy Factor: 82% / 0.78
Fuel Consumption: 30.6 to 121 (CuF/hr) NG /
1.5 to 5.8 (lbs/hr) LP
Ignition Type: electronic
Max. flow rate at 45F temp rise (GPM) 5.0
Max. flow rate at 100F temp rise (GPM)    2.5
Minimum Flow Rate (GPM) 0.5
Dimensions 30 5/16" x 18 1/4" x 8 3/4"
Shipping Weight 45 lbs.
Flue Size 4"
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



Model WR125-K

Small and compact, this unit is popular in cottages, R.V, and marine, hot tubs, portable bush showers, animal grooming, mobile food service trucks, and other smaller applications.



Technical Specifications:

Fuel Types Available: Natural Gas, Propane
Rated Input (BTU/hr.): 40,000 NG
Minimum Input (BTU/hr.): 20,000
Thermal Efficiency: 81%
Fuel Consumption: 18.6 to 37 (CuF/hr) NG /
0.9 to 1.85 (lbs/hr) LP
Ignition Type: Piezo with pilot
Max flow rate at 45F temp rise (GPM) 1.3
Max flow rate at 100F temp rise (GPM)    0.6
Minimum Flow Rate (GPM) 0.6
Dimensions 25 3/8" x 10 5/8" x 9 1/8"
Shipping Weight 25 lbs.
Flue Size 4"
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





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