HearthStone Quality Home Heating Products, Inc ®
19
WFP-75 Model 8411
firebox and place the rest of the pieces compactly. A densely built fire like this will produce the longest
burn your fireplace is capable of.
You will need to be cautious when building fires like this because if the air is turned down too much, the
fire could smoulder. Make sure the wood is flaming brightly before leaving the fire to burn.
MAXIMUM BURN CYCLE TIMES
The burn cycle time is the period between loading wood on a coal bed and the consumption of that wood
back to a coal bed of the same size. The flaming phase of the fire lasts for roughly the first half of the burn
cycle and the second half is the coal bed phase during which there is little or no flame. The length of burn
you can expect from your fireplace, including both the flaming and coal bed phases, will be affected by a
number of things, such as:
Firebox size
The amount of wood loaded
The species of wood you burn
The wood moisture content
The size of the space to be heated
The climate zone you live in
The time of year.
This table provides a very general indication
of the maximum burn cycle times you are
likely to experience, based on firebox
volume.
Long burn times are not necessarily an
indication of efficient fireplace 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 fireplace to the heat
demand of the space.
HOW TO PLACE THE LOGS
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.
5 MAINTAINING YOUR WOOD HEATING SYSTEM
5.1 FIREPLACE MAINTENANCE
Your new fireplace will give many years of reliable service if you use and maintain it correctly. Some of the
internal components of the firebox, such as refractory slabs, baffles and air tubes, will wear over time under
intense heat. You should always replace defective parts with original parts (see
Appendix 11: Parts List
).
Firing each load hot to begin a cycle as described above will not cause premature deterioration of the
fireplace. However, letting the fireplace run with the air control fully open for the entire burn cycles can cause
damage over time. The hotter you run the fireplace throughout burn cycles, the more quickly its components
will deteriorate. For that reason,
never leave the fireplace unattended while a new load is being fired
hot
.
5.1.1 PLATED FINISH MAINTENANCE
If your appliance has a plated finish, use a metal polish and a soft cloth to clean it. Do not use abrasives
such as steel wool, steel pads or an abrasive cleaner for they may scratch the finish.
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
