8
Wood Recommendations
Burn only cordwood that has been seasoned for 12-18 months. Burning unseasoned wood is
wasteful and inefficient, using much of the combustion energy to boil off the excess moisture.
It also puts a lot of moisture into the ash “pan” which makes it corrosive
. The wood
can
be
split to aid in seasoning if it’s real wet and should be approx. 25% moisture content by
weight.
However, whole rounds burn longer and are cheaper but will have to be dried
longer.
The following are general guidelines for wood selection:
• Hardwoods burn better than softwoods (mix them if you need to burn softwood).
• Larger pieces (whole rounds) are best and burn better and lo
nger than small pieces.
• 25% moisture content is optimum. Drier is ALWAYS better!
Higher moisture content wastes energy boiling off water. Wood with a lot of moisture can
cause more smoke than the chimney can dispose of. It also puts a lot of moisture into the
ash
“
pan
”
, which makes an extremely corrosive mixture.
Ash corrosion is NOT covered
by the warranty.
Lower moisture content (very dry, old wood) burns rapidly and inefficiently.
THE HYPROTHERM OUTDOOR WOODBURNING FURNACE
How does an outdoor furnace heat my home?
The HyProTherm outdoor wood furnace is designed to save the most energy and provide the
most comfortable heating available. It heats your home by heating a firebox surrounded by a
steel air chamber. When this air chamber reaches a preset temperature a fan controller turns on
the main circulation blower. This blower forces the air into your existing central duct system.
How do the Thermostat Controls work?
The only visible addition to the heating system inside your home is a 2nd thermostat, which is
located near the existing thermostat, if possible. This thermostat actuates the combustion blower
of your outdoor furnace. When the air inside the air chamber reaches optimum temperatures a
fan controller turns on the main circulation blower. This blower forces the air into your existing
central duct system. The original wall thermostat turns on your original furnace, if the outside
wood furnace is not in operation. Your existing furnace will automatically take over to maintain
your household temperature.
