GMI 4M Dual Fuel

This unit features a dual gas burner able to use natural gas or propane as a fuel source. A dual gas train means that switching fuels is as easy as flicking a switch.

An optional special burner controller can be incorporated eliminating the need to perform combustion calibration after switching fuels.

This unit is an excellent solution for critical needs applications and owners can benefit from the discounted utility rate, where applicable, offered for units with backup fuel capability.

Unique Features

  • Up to 99.8% efficient
  • 316L stainless steel heat exchanger
  • Certified as potable hot water boiler and water heater
  • Control options: Siemens LMV37, Honeywell Sola, Autoflame Mini MK8
  • Burner options: GMI Mesh (20:1 Turndown ratio), Industrial Combustion, Riello, Webster, Powerflame
  • Optional linkageless modulating burner
  • Various communication protocols available
  • Tested at 1.5 times working pressure
Input 4,000,000 BTU/hr 1,173 kW 120 bhp
Output 3,800,000 BTU/hr 1,114 kW 113.5 bhp

10 year prorated warranty on heat exchanger against corrosion of flue gases.

OEM warranty on all other components.

20 year thermal shock warranty on heat exchanger.


Please Note: Actual model may differ from information provided here. For more accurate information please contact our technical support.