Nature's Comfort
Outdoor Wood Boiler

The GT Series Downdraft Gasification Wood Boiler is a 3 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 the unique secondary burn chamber which is the heart of the GT-220 making it a true gasification downdraft unit.

This chamber has small vents at the beginning where the stage 1 exhaust comes through from the burning wood above. The exhaust is ‘turbo boosted’at this point by a 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. This is where gasification occurs. While wood normally burns at 800-1200*F, the temperatures inside the gasification chamber can reach over 2200*F. The stage 2 exhaust is then forced to travel in a spinning motion through refractor 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.

The stage 2 exhaust gases now run through a special stainless-steel honeycomb catalyst filter. Using this catalyst filter increases the stage 2 gasification exhaust heat from 600-1100*F up to 1500*F which further burns particulates and any combustable molecules. Again, when researching competitor's units, check to see if this technology is used. Not wasting any heat, the stage 3 exhaust is then sent up through six pipes that 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!

  GT-220 Downdraft Gasification Boiler Brochure

• - 300,000 & 500,000 BTU
• - Heats Up To 8,000sqft & 12,000sqft
• - Unit Dimensions - 83”T x 45”W x 78”L, (96"L for GT-500)
• - Fire Box Door - 20”x 20”
• - Fire Box Dimensions - 30”T x 28”W x 40”L,  (58"L for GT-500)
• - 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 - 220 gal (300 gal for GT-500)
• - Weight - 2380 lbs (2800 lbs for GT-500)

 Go Green & Heat For Less This Winter

Burning wood for home heating is a great way to reduce your carbon foot print. Wood is considered carbon neutral by some scientists. Carbon released during combustion of wood is in the active carbon cycle. The carbon that trees take in from the atmosphere is released the same way when wood is burnt as it is when wood decomposes. Burning wood is almost totally carbon neutral. Your only carbon foot print is from the cutting and transportation of the wood you are burning.