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Bosch Tankless Water Heaters For Recirculating Systems

Recirculating tankless water heaters for the professional.

    • Up to 82% thermal efficiency
    • Durable heat exchanger specifically designed for recirculating applications
    • Direct vent, vertically or horizontally with AL29-4C stainless steel Category III venting
    • LCD screen displays temperatures, burner operation, & diagnostic codes
    • Separate temperature controls for domestic water heating & recirculation
    • Direct Electronic Ignition no pilot light
    • Whole House Water Heating Solution
    • On-Board diagnostics and safety monitoring
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Model IDModel NameInput
MBH
Output Range
MBH
Efficiency
%
Output Temp
Range dF
Max. Flow
Rate GPM
HxWxDWeight
29551GWH 345 ESR95.023.9 - 77.985.0113 - 1943.527.5x15.75x11.7547
29552GWH 450 ESR120.035.5 - 98.481.0113 - 1944.527.5x15.75x11.7547
  • Residential Use:
    • 10-year limited warranty on heat exchanger
    • 1-year limited warranty on all other parts
  • Commercial Use:
    • 2-year limited warranty on heat exchanger
    • 1-year limited warranty on all other parts

Totally Tanklessstarstarstarstarhalf star4.9 / 5

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58 Total Reviews Totally Tankless



An efficient & reliable comfort system begins with a good plan.