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Outdoor Boilers
What is an outdoor boiler? How do they work?
The interior workings of the outdoor wood furnace 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 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. Below is a diagram to help you better understand the setup of an outdoor boiler. 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.
Forced Air Furnace and Water Heater working with the Nature's Comfort Outdoor Wood Boiler
Direct Plumbed boiler working with the Nature's Comfort Outdoor Wood Boiler
Boiler with Baseboard Heat working with the Nature's Comfort Outdoor Wood Boiler
Below are some diagrams of efficient design ideas with proven results!
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 furnace for running to another heating load. Insulation surrounds the water jacket so that the water temperature is not compromised by weather.
For more information on outdoor boilers, please visit the Nature's Comfort website.