Osburn OB01520 - Manual (Page 21)

Soho 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 stove 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 stove to the heat demand of the space.
4.3.6.5 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.