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When you burn a new load of wood hot to heat up the wood, the insert and the chimney, the result
will be a surge of heat from the insert. This heat surge is welcome when the room temperature is a
little lower than desirable, but not welcome if the space is already warm. Therefore, allow each
load of wood to burn down so that the space begins to cool off a little before loading. Letting the
space cool before loading is one of the secrets to clean burning and effective zone heating.
4.4.5 Turning Down the Air Supply
Once the firewood, firebox and chimney are hot, you can begin to reduce the air supply for a
steady burn.
As you reduce the air supply to the fire, two important things happen. First, the firing rate slows
down to spread the heat energy in the fuel over a longer period of time. Second, the flow rate of
exhaust through the insert and flue pipe slows down, which gives more time for the transfer of heat
from the exhaust. You will notice that as you reduce the air setting, the flames slow down. This is
your indication that the insert is burning at its peak efficiency.
If the flames get small and almost disappear when you turn down the air, you have turned down
the air too early, or your firewood is wetter than it should be. With good fuel and correct air control
use, the flames should slow down, but should stay large and steady, even as the air supply is
reduced.
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Destination 2.3 Insert Installation and Operation Manual
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