Building Different Fires For Different Needs - HearthStone WFP-100 Owner's Manual

In the B position, it is also possible to close the air supply manually if a power failure occurs by pushing the
small lever to the left.

4.3.6 BUILDING DIFFERENT FIRES FOR DIFFERENT NEEDS

Using the air control is not the only way to match the fireplace's heat output to the heat demand. Your
house will need far less heat in October than in January to be kept at a comfortable temperature. If you fill
the firebox full in fall weather, you will either overheat the space or turn the fireplace down so much that
the fire will be smoky and inefficient.
4.3.7 EPA Certification Loading
The charging methods presented below are those that were used during emissions certification.
For EPA Certification testing, wood logs were 16 ± 1 inches long and the specie used was beech.
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WFP-100 Model 8420