CW2900 Installation and Operation Manual
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The table below provides a very general indication of the maximum burn cycle times you
are likely to experience, based on firebox volume.
FIREBOX VOLUME
MAXIMUM
BURN TIME
<1.5 cubic feet
3 to 5 hours
1.5 c.f. to 2.0 c.f
5 to 6 hours
2.0 c.f. to 2.5 c.f.
6 to 8 hours
2.5 c.f. to 3.0 c.f.
8 to 9 hours
>3.0 c.f.
9 to 10 hours
Long burn times are not necessarily an indication of efficient insert operation. When you
are home during the day and able to tend the fire, it is preferable to build a smaller fire that
might provide three or four hours of heating than to fully load the firebox for a much longer
burn. Shorter burn cycles make it easier to match the heat output of the insert to the heat
demand of the space.
3.5.1.5 North-South Fires Versus East-West Fires
In fireboxes that are roughly square, wood can be loaded so that looking through the glass
door you see the ends of the logs (north-south) or the sides of the logs (east-west).
East-west loads that are built compactly break down slowly when heated, but the amount
of wood you can load is limited because if you put in too many pieces, one may fall against
the glass. East-west loads are excellent for long, low output fires for relatively mild
weather.
North-south loads break down more quickly, but much more wood can be loaded at a time.
This makes north-south loading good for high output, long lasting fires for cold weather.
