Bosch Greenstar series, 100-ZWB28-3 model, wall-mounted combi gas condensing boiler (heat + tankless DHW) with 79,000 kBTU (Net) rating. Energy Star rated. Built-in pump, heat exchanger and expansion tank. Includes LPG conversion kit, 3" twin pipe adapter and outdoor reset control.
Technical Specifications:
- Input (BTU): 24,600 - 100,800
- DOE Rating (BTU): 91,000
- Net IBR Rating (BTU): 79,000
- 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: 0.6 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
- 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: 2.65.
Model: Greenstar Combi 100
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