Commercial Boilers - Gas Boilers Series GM™ Boiler

The Series GM™ gas-fired cast iron boiler is the ideal choice for large residences or commercial applications, especially when a cascade application is required. When this boiler is used in single or multiple boiler installations it is designed to be vented into a conventional chimney and can work in higher pressure applications requiring up to a 100PSIG relief valve. The fully-packaged, atmospheric boiler is available in four sizes with inputs of 228 MBH to 399 MBH.




Product Details:

Type: Semi-Commercial
Construction: Cast Iron
Fuel: Gas-Fired (Natural or LP)
Input: 214.5 to 399 MBH
Output: 182 to 320 MBH
Venting: Natural Draft
Trim: Water
Ignition: Spark Pilot


Series GM™ Input, kW Output, kW Net Ratings Water, kW
Model Number Input, MBH HEATING CAPACITY1, MBH Net  Ratings2, MBH  AFUE1, % Thermal Efficiency3, % Combustion Efficiency3, %
GM-e-05 214.5 182 158 84.2 62.9 53.3 46.3
GM-e-06 268 226 197 84.0 78.5 66.2 57.7
GM-07 342 275 239 80.3 82.5 100.2 80.6 70.0
GM-08 399 320 278 80.3 82.5 116.9 93.8 81.5
  1. Heating Capacity and Annual Fuel Utilization Efficiency (AFUE) ratings are based on U.S. Government test.
  2. Net water ratings based on an allowance of 1.15. Additional allowance is required before selecting a boiler for installations having unusual piping and pickup requirements, such as intermittent system operation, extensive piping systems, etc.
  3. Gross Output Rating, Thermal Efficiency and Combustion Efficiency determined in accordance with AHRI requirements.




Series GM™ Boiler Dimensions

Boiler Model Number Jacket Depth
“A”
Jacket Width
“B”
Jacket Height
“C”
Left of Jkt. to C/L of Vent
“D”
Top of Jkt. to Vent Connector
“E”
Vent Size
“F” Dia.
GM-e-05 25-3/4″ 19-1/4″ 35-1/4″ 9-3/4″ 29″ 7″*
GM-e-06 25-3/4″ 22-3/4″ 35-1/4″ 11-1/2″ 30″ 8″*
GM-07 25-3/4″ 26-1/4″ 35-1/4″ 13-1/4″ 31″ 10″
GM-08 25-3/4″ 29-3/4″ 35-1/4″ 15″ 31″ 10″

*Vent diameter is determined by outlet diameter of vent reducer (provided) installed on outlet of vent damper. 8″ to 7″ reducer on GM-e-05; 9″ to 8″ reducer on GM-e-06.