DuraVent DuraPlus HTC - Manual (Page 6)

6
inches (38 mm) from each Chimney Section’s
height to calculate installed height.
CHIMNEY ENCLOSURE REQUIREMENTS
Through Rooms: Interior chimneys shall be
enclosed where they extend through closets,
storage areas, occupied spaces, or anyplace
where the surface of the chimney could
be contacted by persons or combustible
materials. There shall be at least 2 inches (50
mm) between the outer wall of the chimney
and the enclosure (Fig 2).
Multi-Story: Except for installation in single-
and two-family dwellings, factory-built
chimneys which extend through any storey
above that which the connected appliance
is located are to be have enclosures having a
fire resistance rating equal to or greater than
that of the floor or roof assemblies through
which they pass.
Cold Climates: In cold climates, chimneys
mounted on an outside wall should be
enclosed in a chase. Exterior chases reduce
condensation and creosote formation, and
enhance draft. Include an access door by the
Tee Cap for chimney cleaning (Refer to Fig 22).
INSTALLATION TYPES
There are four general types of DuraPlus HTC
Chimney installations:
1. Ceiling-supported
2. Roof-supported
3. Tee-supported (through-the-wall)
4. Zero-Clearance Fireplace
Figure 4
3” (75
mm)
BELOW
FINISHED
CEILING
SUPPORT
BOx
ATTIC
Figure 3
ATTIC
MINIMUM OF
3-INCHES (75mm)
BELOW
FINISHED CEILING
18-INCHES
(450mm)
MINIMUM FOR
SINGLE-WALL
STOVEPIPE
CHIMNEY CAP
STORM COLLAR
ADjUSTABLE
FLASHING
CHIMNEY
SECTIONS
ATTIC
INSULATION
COLLAR
FRAMED
OPENING
SqUARE
SUPPORT
BOx
REFER TO TABLE 2 FOR
FRAMING DIMENSIONS