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Heat & Glo • CFX-CRESCENT • 705-900 Rev. P • 12/0712
Framing should be
constructed of 2 X 4
lumber or heavier.
A B C D
35 1/2” 43 5/8” 19 5/8” 47 3/4”
(902mm) (1108mm) (498mm) (1213mm)
Shows center of
10” x 10” vent
framing holes
for top venting.
Figure 3. Framing Dimensions
Minimum Clearances from the Vent Pipe to
Combustible Materials
For Vertical
For Horizontal Sections Sections At Wall Firestops
Top Bottom Sides Top Bottom Sides
3 inches 1 inch 1 inch 1 inch 2-1/2 inches 1/2 inch 1 inch
(75 mm) (25 mm) (25 mm) (25 mm) (63.7 mm) (13 mm) (25 mm)
For minimum clearances, see the direct vent
termination clearance diagrams on pages 21 and
22 in this section.
Step 2
Framing the
Fireplace
Fireplace framing can be built before or after the
fireplace is set in place. Framing should be
positioned to accommodate wall coverings and
fireplace facing material. The diagram below shows
framing reference dimensions.
CAUTION
MEASURE FIREPLACE DIMENSIONS AND
VERIFY FRAMING METHODS AND WALL
COVERING DETAILS BEFORE FRAMING
CONSTRUCTION BEGINS.
46 3/4 (REF)
D
A
B
C