Minimum Clearances from the Vent Pipe to
Combustible Materials
For Horizontal Sections | For Vertical | At Wall Firestops | |||||
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Top | Bottom | Sides |
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3 inches | 1 inch | 1 inch | 1 inch | 1/2 inch | 1 inch | ||
(75 mm) | (25 mm) | (25 mm) | (25 mm) | (63.7 mm) | (13 mm) | (25 mm) | |
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Step 2
Framing the
Fireplace
For minimum clearances, see the direct vent termination clearance diagrams on pages 21 and 22 in this section.
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)
B
D
Shows center of 10” x 10” vent framing holes for top venting.
Framing should be constructed of 2 X 4 lumber or heavier.
A
C
A | B | C | D |
35 1/2” | 43 5/8” | 19 5/8” | 47 3/4” |
(902mm) | (1108mm) | (498mm) | (1213mm) |
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Figure 3. Framing Dimensions
12 | Heat & Glo • |
