Building Different Fires For Different Needs; Epa Certification Loading - Osburn OB04010K Installation And Operation Manual

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.
4.3.7.1 High burn rate
Open the air control completely (see Section 4.3.5, position A). Place two medium kindling pieces (2"x2") of
wood on the brick of the firebox in a north-south orientation. Then, put two other medium kindling pieces
(2"x2") of wood above the first one with an east-west orientation. Then, put two more rows of smaller
wood (1"x1") on top of the first two rows. The first row, put four pieces with a north-south orientation and
the second one, put two more pieces with the east-west direction. Leave a little space between each piece.
Tie knot with four sheets of paper and place them on top of the kindling wood. Light up the paper and let
the door ajar at 90° until all the wood is on fire. Close the door.
When there is no more fire in the front of the firebox and there are only faint flames on the wood in the
back of the firebox, break ashes, level the coal bed and put four start-up fuel pieces (3"x2"). Put the first
two bigger pieces with a north-south orientation and a second row of two pieces with an east-west
orientation. Spaced them of around 6 inches. Let the door ajar until all the wood is on fire. Close the door.
Once again, when there is no more fire in the front of the firebox and there are only faint flames on the
wood in the back of the firebox, break ashes and level the coal bed. Then place two rows of three pieces of
wood (4"x4") in the middle of the fire chamber in a North-South orientation. They should touch the rear
bricks and be 1 ½ inch apart from each other. Close the door immediately and leave the primary air control
completely open.
4.3.7.2 Medium and low burn rate
On a 2" coal bed that is still slightly red, place two rows of three pieces of wood (5"x4") on the left side of
the fire chamber with a north-south orientation then place one more piece of wood (5"x4") on the right
side of the two rows. There should be all at least 1 inch of air between each column. Let the door ajar for 5
minutes and then close the door with the primary air control fully open. Wait for approximately 2 more
minutes before closing manually the primary air control completely. For the medium burn rate, push the
auxiliary air control toward the fireplace (see Section 4.3.5, position B-2). For the low burn rate, pull the
auxiliary air control out (see Section 4.3.5, position B-1).
HORIZON – Installation and Operation Manual
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