Commercial Wood Gun - Wood and Biomass Boiler - Gasification Boiler Applications

Wood Gun commercial boilers come in sizes from 100,000 to just under 1,000,000 btus per hour. Commercial Wood Gun E500 Wood Boiler


  • Automatic cycling on and off in response to heating or hot water demand.
  • Domestic hot water coil provides abundant quantities of hot water.
  • Exceptionally safe and clean burning. The use of dense refractory material cast into specific shapes causes complete combustion to occur at temperatures of up to 2000° F.
  • When operated properly in the gasification mode, visible smoke is eliminated and creosote formation inside the chimney is prevented.
  • The large cyclone separator removes most of the fly ash resulting in very 
  • low emission.
  • Re-ignition of the wood will occur after an off period of 2-4 hours, when there is a call for heat from the boiler (subject to refractory temperatures).
  • Wood Gun readily adapts to new or existing hot air systems through the use of a heat convection coil.
  • The design maintains all heated walls at the same temperature using a "water wall". This constant temperature eliminates stress fractures caused by differences in temperature between components of the boiler thus increasing it's life. In addition, this design produces greater efficiency because heat that is normally lost through a drywall is captured in the water wall.

Wood Gun E Series Wood Boiler Specifications

Model: E100/E155 E140 E180 E250
BTU/Hour Max 150,000 200,000 230,000 350,000
BTU 8 Hour Avg Output* 100,000 140,000 180,000 250,000
Water Capacity, Gallons 60 80 90 140
Firebox Capacity, Cubic Feet 6.5 10 14 22
Firebox Length, Inches 24 32 32 48
Standard Door Opening 14" x 14" 14" x 14" 14" x 14" 14" x 14"
Height 58" 64" 66" 74"
Width (cyclone removed) 26" 26" 31" 31"
Depth 44" 48" 48" 66"
Flue Size 6" 6" 6" 8"
Weight (without gas/oil backup), lbs 1,400 1,650 2,100 3,000
Typical Heating Capacity, Square Feet** 3,000 4,000 5,000 9,000
*Based on loading firebox with seasoned hardwood
**Subject to building design/construction
Specifications subject to change without notice


Wood Gun E Series Commercial Biomass Boiler Specifications

Model: E500 E1000
BTU/Hour Max 600,000 995,000
BTU 8 Hour Avg Output* 500,000 995,000
Water Capacity, Gallons 210 435
Firebox Capacity, Cubic Feet 28 46
Firebox Length, Inches 54 60
Standard Door Opening 18" x 18" 18" x 18"
Height 90" 102"
Width (cyclone removed) 34" 48"
Depth 72" 78"
Flue Size 10" 12"
Weight (without gas/oil backup), lbs 4,500 9,000
Typical Heating Capacity, Square Feet** 20,000 50,000
*Based on loading firebox with seasoned hardwood
**Subject to building design/construction
Specifications subject to change without notice
Stainless Steel ConstructionCommercial Wood Gun with Auto Feed

Wood Gun wood boilers feature 1/4" thick Type 304 stainless steel in the construction of the firebox and door frames.1 We use Type 304 stainless steel for its unsurpassed quality and longevity. Some of our stainless steel boilers have been in service for over 29 years and they show virtually no signs of deterioration. It is the combination of the Wood Gun's stainless steel construction and the ability to utilize an off cycle that eliminates the need to use thermal storage in heating applications that utilize the Wood Gun.

Wood Gun Residential or Commercial?

E250/E500/E1000 Commercial Wood Guns are characterized by larger capacities, heavier door refractory, belt-driven induction fans (E250 and larger, optional for smaller units), and optional features (dual air inlets, top fuel feed port and others) not found on our residential units. It is best to size a unit based on heat load, with the goal of having sufficient load on the boiler to keep good refractory temperatures.

What makes the Wood Gun Great!

Wood Gun Brochure

Wood Gun Commercial Brochure

EPA News Release


1Carbon steel construction of firebox and door frame areas available by special order. This requires thermal storage and/or continuous duty operation. Carbon steel is used for heat exchange surfaces in the E250/E500/E1000.