Silver Dealer Design Award
2008 Silver Dealer Design Award For GMI 4M


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.

Award-winning boiler capable of heating up to 80 apartment units.

Product Features

  • Up to 99.8% efficient
  • 316L stainless steel heat exchanger
  • Optional designs for Natural Gas / LPG / Dual Fuel / Biogas
  • Control options: Siemens LMV37, Honeywell Sola, Autoflame Mini MK8
  • Burner options: GMI Mesh (20:1 Turndown ratio), Oilon, Industrial Combustion, Riello, Webster, Powerflame and others
  • Low greenhouse gas emissions
  • LEED credits available
  • Low environmental impact
  • Internationally patented
  • Single pass, tank-less
  • Certified for potable water
  • Thermal shock proof
  • Tested at 1.5 times working pressure
  • Direct Vent System Certified UL 1738 – USA & CULS636 – CAN
  • SCAQMD Listed
  • CSA design certified
Input 4,000,000 BTU/hr 1,172 kW 120 bhp
Output 3,800,000 BTU/hr 1,114 kW 113.5 bhp


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

Series Brochure