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CORNER HEARTH PAD
Minimum hearth size in a corner installation must be 54”x54” (with the front corner cut off). NOTE: On a
hearth of minimum size, the stove will not be centered left to right, but will meet the minimum required
clearances.
Calculating a Corner Hearth Pad (per NFPA 211):
A=C x 1.414 + W/2 + D + Front Hearth Requirement
A =distance from corner to the front of the hearth pad
C = clearance from rear corner of appliance to wall (12” w/
rear heat shield)
1.414 = a constant
W/2 = one half the width (15.25”)
D = appliance depth (25”)
Front Hearth Clearance= 12”
Example:
Progress with the Rear Heat Shield & Pipe Shield
A= 12” x 1.414 + 15.25 + 25”+12” A= 69”
Note: If using the optional Ash Lip A= 65”
If using the optional Short legs and Ash Lip A= 73”
WALL PROTECTION
The Model 209 Progress Hybrid stove has been tested to UL standards for
clearances to combustible walls. The minimum clearances to unprotected walls
are as follows:
Minimum clearances with no heat shields to unprotected combustible walls:
From the back-------------------36”
From the sides-------------------24”
Do not assume that a wall is not combustible because it has a nonflammable
surface. A wall with any combustible materials in it must be considered com-
bustible. For example, a brick wall attached to wood studs is considered a com-
bustible wall. Over time, heat will pass through bricks and heat the wood, lowering the ignition
temperature of the studs, possibly resulting in a fire. As waves of radiant heat energy meet a combustible
object, heat is absorbed and the temperature of the object is raised, which can result in spontaneous com-
bustion. Similarly, wood-framed walls which are covered with tile, stone or fire-rated sheetrock must be
considered combustible. Fire-rated sheetrock is also considered combustible due to the paper covering.
If you wish to install your stove closer to a combustible wall than standard clearances will permit, you
can either attach a UL approved stove & pipe shield, or mount a protective non-combustible shield on the
wall.
Stove and Pipe Shields:
Clearances can be reduced by attaching a UL approved heat shield and pipe shield. Woodstock Soap-
stone Company carries heat shields specifically designed for this stove. When using one or both of these
shields, clearance is measured from the back of the shield to the combustible wall. The clearance be-
hind the stove can be reduced to 7 inches. The clearance behind the pipe can be reduced to 6 inches.
9
A=69”
60”
60”
43”
23”
CORNER HEARTH PAD
Progress Hybrid shown above
centered left to right
Rear heat shield & pipe
shield greatly reduce re-
quired clearances
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