Bosch Greenstar ZBR28 Wall Mounted Boiler

Description

Long Description with Specifications

The Bosch ZBR‑28‑3 Greenstar 100K BTU Wall‑Hung Condensing Boiler is a compact, ultra-quiet, high-efficiency condensing boiler designed for residential hydronic heating applications. Engineered by Bosch, this wall-mounted unit combines modern condensing technology with precise combustion control, delivering reliable heating performance and reduced energy consumption.

Built for space-heating systems connected to a hot water tank, this boiler features a modulating burner for more efficient fuel usage, insulated construction to minimize noise, and flexible venting options. Its design allows for direct vent installations and compatibility with Natural Gas or Propane.

Key Specifications:

• Boiler Type: Condensing, wall-hung hydronic boiler

• Fuel: Natural Gas or Propane

• BTU Input: Up to 100,000 BTU

• Net Output: ~79,000 BTU (Net IBR)

• AFUE Efficiency: ~95–96%

• Modulation Ratio: ~5:1

• System Type: Hydronic (hot water space heating)

• Vent Type: Direct vent (PVC/CPVC/PP or stainless steel)

• Operating Water Temp: Up to 190 °F

• Water Pressure: Max 30 psi

• Connections: 1″ supply/return; 3/4″ gas connection

• Dimensions: ~13.9″ (D) × 17.4″ (W) × 33.5″ (H)

• Weight: ~103.6 lb

Features & Benefits:

• Advanced condensing heat exchanger for high efficiency

• Quiet operation with insulated casing

• Includes built-in circulator pump

• Compatible with indoor or outdoor sensors/controllers

• ECO and modulation control for optimized efficiency

• Eligible for federal tax incentive programs