Combustion Cycles - Osburn CW2100 Owner's Manual

Although the insert may be able to heat the main living areas of the house to an adequate
temperature, it is strongly recommended to also have a conventional oil, gas or electric heating
system to provide backup heating. The success of zone heating will depend on several factors,
including the correct sizing and location of the insert, the size, layout and age of the home and
the climate zone. Three-season vacation homes can usually be heated with smaller inserts than
houses that are heated all winter.
3.4

Combustion Cycles

Zone heating is very different than other forms of heating. There will be temperature variations in
different parts of the house and there will be temperature variations throughout day and night.
This is normal, and for experienced wood burners these are advantages of zone heating wood
burning.
Wood heaters don't have a steady heat output. It is normal for the temperature to rise after
a new load of wood is ignited and for its temperature to gradually decrease throughout the
burning cycle. This increasing and decreasing temperature can be matched with the household
routines. For example, the temperature in the area can be cooler when the household is active,
and it can be warmer when it is inactive.
Wood burns best in cycles. A cycle starts when a new load of wood is ignited by hot coals and
ends when that load has been consumed down to a bed of charcoal about the same size as it
was when the wood was loaded.
Trying to produce a steady heat output by placing a single log on the fire at regular intervals
is not recommended. Always place at least three, and preferably more pieces on the fire at a
time so that the heat radiated from one piece helps to ignite the pieces next to it. Each load of
wood should provide several hours of heating. The size of each load may vary depending on the
amount of heat required.
Burning in cycles means the loading door does not need to be opened while the wood is flaming.
This is an advantage since it is preventing smoke leaking from the heater when the door is
opened as a full fire is burning. This is especially true if the chimney is on the outside wall of the
house.
If the door must be opened while the fire is flaming, fully open air control for a few minutes
then open the door slowly.
Wood Inserts – Owner's Manual
Page 13