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  • Bosch Greenstar 131 Heat Only Wall Condensing Boiler - ZBR35-3

    - Natural Gas or Propane Gas - Heat Only - 131000 Btus

    Product ID • 771223141400

    Available in Stock: 0

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Bosch Greenstar Heat Only Wall Condensing Boiler - 131 MBH - NG/LP - ZBR35-3

Bosch Greenstar condensing boilers offer efficiency levels of up to 96.1% efficiency,  Turning 98.7% of the fuel used into heat - a significant upgrade compared to traditional or non-condensing boilers. Used for all type of Hot Water Heating such as Radiant, Baseboards, Radiators and more. The Bosch Greenstar ZBR35-3 has an ASME approved Al-Si heat exchanger constructed of advanced magnesium aluminum-silicon alloy offering increased flexibility versus traditional stainless steel. This highly durable heating block is corrosion resistant and designed to optimize clean burning combustion over an extra large surface area.

Bosch Greenstar ZBR35-3 131 puts out 131,000 Btu's for Heat at 96% AFUE rating.

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Technical Specs

Bosch Greenstar ZBR35-3 131 Heat Only Boiler - Techs and Specs

  • Gas
    Natural Gas
  • Maximum Heat Input
    131,000 Btu/hr
  • Minimum heat input
    36,000 Btu/hr
  • Efficiency
  • Nominal power supply voltage
    120/60 V/Hz
  • Dimensions
    17.4 Inches L x 33.5 Inches H x 13.9 Inches D
  • Heating Water Pipe Connections
    1 Inch NPT
  • Gas Pipe Connections
    3/4 Inch NPT
  • Venting Size 2 Inches
    81 Foot Max less elbows
  • Venting Size 3 Inches
    131 Foot Max less elbows
  • Maximum heating pressure
    30 Psi
  • Maximum pressure of domestic water circuit
    150 Psi
  • Weight
    103 Pounds
  • Warranty
    10-year heat exchanger, 5-year parts, and 1-year labor limited warranty
  • * DOE Heating capacity is based on standard test specified by the United States

Bosch Greenstar ZBR35-3 131 Heat Only Boiler - Features

  • Heat Only - Wall Mounted
  • Turndown to 36,000 Btu's
  • Certified DOE efficiency of 96% Efficiency
  • Outdoor reset with accessory temperature sensor included
  • Built-in boiler circulator pump
  • All models are field convertible from NG to LP with included conversion kit
  • Can be vented with PVC or CPVC

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