Model 4

  • Steam or hot water
  • 1.5 to 6.0 MMBTU/hr
  • Natural gas, #2 oil, propane, digester
  • 15 to 500 psig on steam (special to 675 psig) on steam
  • 140 psig on hot water standard with option to 450 psig @ 410F

The Model 4 membrane wall watertube boiler is a high-performance, super-compact unit designed specifically to fit through a doorway.