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How The Nature's Comfort Outdoor Wood Boiler Works!Simple! The interior workings of the outdoor wood boiler consist of a firebox, and within the firebox is a chimney, a grate with a powered blower that forces air up into the fire for a greater and more efficient burn. Wood is loaded into the firebox the same way as a traditional fireplace. Surrounding the firebox is at least a 120 gallon water jacket. The wood is burned in the firebox, thereby heating the water in the surrounding water jacket. A pump at the back of the outdoor boiler sends the heated water on a continuous loop to the house through an insulated PEX line to a heat exchanger on your furnace and the water heater inside your home, then back again for reheating. More connections can be made to heat a pool, a sauna, a hot tub, a garage and other buildings. For this, a second pump would be installed and a second set of PEX lines would be connected to the outdoor boiler for running to another heating load. Insulation surrounds the water jacket so that the water temperature is not compromised by weather. The firebox is surrounded by water along with the ash pan and a portion of the chimney as well, extracting as much heat as possible from the red hot coals. The chimney protrudes down into the firebox about 1 foot from the bottom so that smoke, and more importantly heat, is trapped so it doesn't quickly escape out the flue. This also creates a second burn sequence to more completely burn the gases and wood. Efficient design ideas with proven results. |  |
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Forced Air Furnace and Water Heater working with the Nature's Comfort Outdoor Wood Boiler |
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Boiler with Steam Baseboard Heat working with the Nature's Comfort Outdoor Wood Boiler |
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Direct plumbed boiler working with the Nature's Comfort Outdoor Wood Boiler |
The GT-220 wood furnace is a 3 stage outdoor wood burning furnace; that has a jet-engine inspired secondary burn chamber designed to heat the stage 1 exhaust from burning wood to temperatures so high that unburned fuel left in the stage 1 exhaust is ignited for a 2nd stage of burning.
Custom formed firebrick line the very unique Double Secondary Burn Chamber (DSCB) 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 blower. This air boosts the re-ignition for the stage 2 burn, supplying much needed oxygen to the fire forcing it to curl into itself 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. The temperatures inside the DSBC can reach 2000 F or more. Wood normally burns at 800-900F! 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. For maximum heat transfer, the firebricks are cemented to the steel.
The stage 2 exhaust gases now run through a ceramic honeycomb catalyst filter. Using this catalyst filter increases the stage 2 gasification exhaust heat from 500F-800F up to 1500F which further burns particulates and any usable molecules. 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-220 the most efficient, cost effective wood boiler you can find!
