How the System Works
How They Work
The Classic Outdoor wood furnace is installed outside, typically 30 to 200 feet (but as far as
500 feet) away from your home or business, and works with any existing heating system.  A
water jacket surrounds the furnace firebox and heated water is circulated to the home or
building through insulated underground tubes.  Water-to-air or water-to-water heat
exchangers or direct circulation conveys the heat into the structure's forced-air furnace, boiler
or radiant floor heating system.  This allows for normal thermostatic control of temperature
for safe, even and comfortable heat.  The ability to heat multiple buildings and domestic
water can eliminate your heating bills.  Outside burning removes the threat of devastating
chimney fires and the dangerous carbon monoxide buildup or oxygen depletion which
affects your indoor air quality.  It also eliminates the smoke, ashes, odors and soot buildup
on walls and ceilings inside your home that indoor burning creates.
ThermoPEX is a flexible pre-insulated piping
system that saves energy and maximizes the
efficiency of your outdoor furnace.  
ThermoPEX is buried underground from your
outdoor furnace to the building that you are
How the Firebox & Furnace Work