EPA certified and approved outdoor wood burning furnace

EPA White Tag, Phase II
certified and approved
outdoor wood burning furnace



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Please consider this inexpensive
EPA Certified wood burning stove now.

Phase II Qualified White Tag EPA Approved Furnace

The NEW! EPA Phase II, White Tag Qualified

The GT-6000 Downdraft Gasification Wood Boiler is a 2 stage, outdoor wood burning furnace that has a jet-engine inspired secondary burn chamber designed to heat the stage 1 burning wood exhaust to temperatures so high that unburned fuel left in the stage 1 exhaust is ignited for a 2nd stage of burning.

Special firebrick line not only the firebox but also the unique secondary burn chamber which is the heart of the GT-220 making it a true smokeless burning gasification downdraft unit. The large amount of firebrick used in the GT-6000 is a unique design and makes for a tremendous "flywheel" effect and greater efficiency.

The stage 1 exhaust from the burning wood in the firebox travels down through to the secondary burn chamber (gasification chamber). The exhaust is ‘turbo boosted’ at this point by super-heated forced air. This air boosts the combustion for the stage 2 burn, supplying oxygen to the fire which increases the heat and burn efficiency. 

The firebrick reaches a 'hyper-heated' condition causing the fire to burn even hotter. All this is where gasification occurs. While wood normally burns at 800-1200F, the temperatures inside the gasification chamber can reach over 2600F. The stage 2 exhaust is then forced to travel in a spinning motion through refractory channels. This circulation helps the refractory to evenly transfer the heat to the steel, then to the water. When researching competitor's units, check to see if they utilize this technology.

Phase II Qualified EPA Wood Burning Furnace Firebox
Not wasting any heat, the stage 2 exhaust is then sent up through 2 sets of six pipes with butterfly diverters to again spin the hot exhaust gases.

Again, when researching competitor's units, check to see if this technology is used.

The heat exchanger pipes are surrounded by a flow of water from the circulating pump. This pulls even more heat into the water finishing the burning & heating process to make the GT Series the most efficient, reliable & cost effective gasification outdoor wood boiler you can find!


  • - 250,000 BTU
  • - Heats Up To 5,000 sq ft*
  • - Unit Dimensions - 83”T x 45”W x 78”L
  • - Fire Box Door - 20”x 20”
  • - Fire Box Dimensions - 30”T x 28”W x 40”L
  • - Fire Box Thickness - 1/4”Steel
  • - Water Jacket Thickness - 3/16”Steel
  • - Insulation - Fiberglass R-19 w/ Foil Foam,
      Double Insulated All The Way Around
  • - Water Jacket Capacity - 250 gal
  • - Weight - 3,000 lbs




Just US$8980; thousand less than competitors!


* (This must include all heated areas of home as well as basement)
with proper installation, properly insulated building and when
properly seasoned hardwood is used (20% moisture content).

Deduct a minimum 500 sq ft if heating domestic hot water.


Phase II White Tag Qualified EPA Wood Burning Furnace

NEW! GT-6000 : 1/4" Thick Firebox $8980

Heats up to 6,000 sq ft** | 250 gal. water jacket | 250,000 BTU | 3000 lbs

Fire Box:

Cubic Feet          Height  Width  Depth

15.8                       30”         28”         40”


Furnace supplied by Nature's Comfort







BTU Load Calculator


Shaver Outdoor Wood Furnace
328 Hwy 62 West
Salem, AR 72576


Modified 5-4-2013

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