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LIGHTWEIGHT BLOCK-IN - SPECIFICATIONS (Cont.)
Fireplace Placement (Continued)
Determining the exact placement of the fireplace is crucial for construction and safety
purposes. Such factors as facing material depth, masonry enclosure size, and chimney
location all factor in to the final location of the fireplace. The illustration below and on the
following page outlines the considerations that must be followed for proper fireplace
placement. The fireplace faceplate must be a minimum of 29 1/2" in front of any chase
framed wall. The fireplace body must have a 1" airspace between it and the masonry
enclosure on both sides and the back (to be filled with insulation as an expansion buffer).
The masonry enclosure must be made with lightweight concrete block (75% pumice) with the
nominal dimensions of 4 by 8 by 16 (actual size is 3 1/2" thick by 7 1/2" tall by 15 1/2" wide).
There must be a minimum thickness of 3 1/2" on the side and back and 7 1/2" on the top of
the fireplace. The bottom of the enclosure requires 11" of masonry constructed as illustrated
in the following instructions.
24"
Typical
With brick facings offsets are
needed to obtain minimum 4 1/2"
horizontal clearance to header.
When determining the placement of the fireplace it is also important to calculate the minimum
clearance to combustibles. Minimum clearance to combustibles measured from the faceplate
of the Fireplace Xtrordinair should meet or exceed:
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18" to adjacent sidewall
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4 1/2" on sides to combustible facing
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26" on top to combustible facing
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Raised hearth extension must extend 16" in front and 8" to each side.
Required 6" Cooling Vent (Optional Location)
CHASE FRAMED WALL
2" Min.
3 1/2" Min.
MASONRY BLOCK-IN
1" Min.
FIREPLACE XTRORDINAIR
29 1/2" Min.
1" fiberglass insulation for expansion
buffer on both sides, top, and back
Page 7
Blocked-in
Blower Box
(Optional
Placement)
26" Best
3 1/2"
18" Min.
Adjacent Sidewall
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