6
Minimum Clearances from the Flue 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)
Framing should be constructed of
2 X 4 lumber or heavier.
A
B
C
D
E
42"
38-1/2"
22"
26-7/8"
41 1/2"
(1066mm) (978mm) (559mm) (6837mm) (1054mm)
FIGURE 3.
Framing Dimensions
For minimum clearances, see the direct vent termination
clearance diagrams on page 7.
1.2 Framing the Heater
Framing can be built before or after the heater is set in
place. Framing should be positioned to accommodate
wall coverings and heater facing material. The diagram
below shows framing reference dimensions.
CAUTION: MEASURE HEATER DIMENSIONS AND
VERIFY FRAMING METHODS AND WALL COVER-
ING DETAILS, BEFORE FRAMING CONSTRUCTION
BEGINS.
The framing
headers may rest
on the heater
stand-offs.
A
B
C
E
D