Greenstar 151 Condensing Gas Combi Boiler, 117,000 BTU
Brand: Bosch
Part#: ZWB42-3
Model: Greenstar Combi 151
Usually ships: within 2-3 business days
Bosch Greenstar series, 151-ZWB42-3 model, wall-mounted combi gas condensing boiler (heat + tankless DHW) with 117,000 kBTU (Net) rating. Energy Star rated. Built-in heat pump, exchanger and expansion tank. Includes LPG conversion kit, 3" twin pipe adapter and outdoor reset control.

Technical Specifications:
  • Input (BTU): 36,000 - 151,600
  • DOE Rating (BTU): 135,000
  • Net IBR Rating (BTU): 117,000
  • Efficiency (AFUE): 95%
  • Boiler Type: Condensing
  • Turndown (Modulation) Ratio: 5 : 1
  • Fuel Type: Natural Gas (NG) or Propane (LP)
  • System Type: Hydronic (Hot Water)
  • Boiler Connections: 1" NPT
  • Gas Connection: 3/4" NPT
  • Condesate Amount Produced: 0.9 Gal/hr (@ 86°F)
  • Max. Working Pressure: 30 psi
  • Max. Boiler Output Water Temperature: 190°F
  • Domestic Water Connections: 3/4" NPT
  • Vent Size: 2" (up to 81ft w/ 1 elbows) or 3" (up to 100ft w/ 4 elbows)
  • Vent Material: PVC, CPVC, Single Wall (Rigid) PolyPropylene, Flex PolyPropylene, Cat III St. Steel
  • Inlet Gas Pressure (WC): 3.5 - 10.5" (for NG), 8 - 13" (for LP)
  • Max. Elevation: 6,000 ft (3% per 1,000ft de-rating)
  • Mounting Type: Wall-hung (wall-mounted)
  • Dimensions (Depth x Width x Height): 13.9" x 17.4" x 33.5"
  • Weight (lbs): 110.2
  • Water Volume (gallons): 0.952
  • Max. DHW Flow @ 72°F Rise: 4.0.
 
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