GMHB/GMCB Series - Condensing Water Boiler

95% AFUE / 95% Thermal

Combi and Heating-Only Models Available Residential and Light Commercial Models

95% AFUE/Thermal Efficiency (Dependent on Model)

Up to 6.25:1 Turndown Ratio

Wall Mounted

NPT Connections

Stainless Steel Primary Heat Exchanger Combi Models feature Stainless Steel DHW Heat Exchanger

Domestic Hot Water priority 3-way valve

DHW models are equipped with pre-heating function to speed up the delivery of hot water

Advanced Electronics

Anti-Wind Function - control automatically adjusts the fan speed to prevent loss of flame and lockouts

Flame Stabilization - control allows the flame to stabilize before modulating, preventing flame drop outs and recycling

Frost and Pump Protection

User display interface features digital temperature display with diagnostics & programmable settings Venting

Polypropylene Twin Pipe or Coaxial

Warranty

Residential - 1 Yr. Parts/ 10 Yr. HX-non-prorated

Commercial - 1 Yr. Parts/ 5 Yr. HX-non-prorated

Efficiency:
High Efficiency

Capacity:
122, 160, 227, 379 MBH.

Heat Exchanger:
Stainless Steel

Combustion:
Sealed Combustion

Venting:
Direct Vent

Boiler Type:
Condensing Boiler

Options:
Outdoor Temperature Sensor
Indirect Tank Sensor
CSD-1 Kits Available
LP Conversion Kits

Installation & Operation Manual

GMHB IOM (227, 380) Rev B

Parts Lists

GMHB Parts (227, 380) Rev D

Technical Bulletin

Flood Bulletin

User Manual

GMHB / GMCB User Manual Rev A

Warranty

Green Mountain Condensing Boiler Warranty Rev. A

Boilers - Gas