Product Lines | Stay Comfy with High Efficiency Comfort Systems

Staying comfortable year round isn't hard when your heating and cooling systems are properly sized and installed. Call B.F. Mahn today to schedule your installation!

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28 Total Reviews /files//bf_mahn-logo.png636-586-2300$112 W Clement St., De Soto MO

Get Your new Comfort System today! Call B.F. Mahn & Sons Inc.

Evergreen Gas Boilers

The new Evergreen™ boiler extends comfort levels to every area of your property for the long run. The Evergreen is perfect for light commercial or large residential applications and single or multi-unit installations with ZoneStacking™ up to 24 programmable zones. Its everything you want in heating: quiet operation' aesthetically pleasing design' floor standing or wall mount options' environmental sustainability with Low NOx' heating comfort with lower utility bills and more.

  • Stainless Steel Fire Tube Heat Exchanger with non-metallic base
  • Standing Boiler with optional wall mount kit
  • Modulating Condensing Boiler with 10:1 Turndown
  • 95% AFUE (220/299); 96.5% Combustion Efficiency (399)
  • Up to 8 Multiple Boiler Control with lead/lag rotation
  • Multiple Inputs can be assigned one priority (Zone Based Control)
  • Configurable Auxiliary Input/Output System
MODELInput MBtuHOutput MBtuHAFUEDimensions
Water Content
EVG 220220.0 206.0 95.0 45x23x22.75 4.60 215
EVG 299299.0 280.0 95.0 45x23x22.75 7.00 260
EVG 399399.0 383.0 96.5 45x23x22.75 6.70 260

Warranty Information

  • All Parts for 24 months -
  • Heat Exchanger for 144 months -

Available Documents