CB
Built Like A Tank With Laser Precision
Page
9
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E. Wood Recommendations
For maximum efficiency and burn times, you should only burn wood that has been seasoned for 12-24
months and sheltered from rain and snow. Burning unseasoned wood is wasteful and inefficient. Freshly
cut, “green” wood uses much of the combustion energy to dry out the excess moisture. Ideally the wood
should be split in 6-8” diameter pieces to aid in seasoning and should be around 20% moisture content by
weight. Whole rounds burn well and are cheaper, but this type of wood also will have to be dried much
longer, especially if in larger diameters.
The following are general guidelines for wood selection:
Keep wood covered but open to the wind as rain and snow will greatly hamper the seasoning.
Hardwoods burn longer than softwoods as they are denser and have more available BTU’s.
Larger pieces burn longer than small pieces but take longer to season properly.
20% moisture content is optimum.
Wood with higher moisture content wastes energy to dry out wood.
Too low of moisture content (very dry, rotten, old wood) burns rapidly and inefficiently.
F. Heating the Home
The GT-220 is designed to save energy and provide the most comfortable heating available. It heats
your home by heating a firebox, refractory channel and heat exchanger surrounded by a steel tank
filled with water. The boiler is a non-pressurized boiler with an atmospheric vent. The hot water is then
circulated through underground pex pipes to a water coil (heat exchanger) installed inside your
existing central duct system. (Typical of most systems)
A typical water-to-air heat exchanger much like a small radiator or heater core in a car is installed in
your ductwork. When air travels through, heat is extracted and hot air is emitted out of your registers.
Your GT-220 can also be connected to any existing radiant heating system that operates at 190
degrees or less using a plate heat exchanger (See page 20). When connecting directly to an in-floor
heating system, be sure to use a mixing valve to keep temperatures below the maximum rating of your
system (usually 110F).
G. Heating Domestic Hot Water
To heat your domestic hot water, water from the outdoor boiler is circulated through a “water to
water” heat exchanger which is connected to your existing hot water heater. This is either a plate or
side-arm style heat exchanger. The hot water from the boiler usually goes to the exchanger at your hot
water heater and then to the exchanger on your furnace. You may use either style exchanger with
your hot water heater. If heating your home through a radiant system, first go through the exchanger
for your old boiler system, then through the exchanger for your domestic hot water heater. Reverse
this sequence for forced air systems. See page 19 for a layout of piping for a sidearm type install.