Installation
900608-00 01/2019
Innovative Hearth Products
MHD40 Series Multi-View Direct-Vent Gas Fireplaces
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE
19
Figure 24D
1” (26 mm)
Minimum
Clearance to
Combustibles
8 ft. (2.4 M)
Maximum
SV4.5VF
Firestop /
spacer
SV4.5SP
Support Plate
SV4.5SU
Support Strap
Shown With
Optional
Radiant
Panels
Secured
to Vent with
Appropriate
Fasteners
Ceiling
Framing
When
using
secure
Flex, use
Firestop/
Spacer
SF4.5VF
SV4.5FA or
SV4.5FB Flashing
and SV4.5SC
Storm Collar
SV4.5CGV-1
Termination
Attic Insulation shield
E.
Support the vertical vent run sections -
NOTE:
Proper venting support is very important.
The weight of the vent must not be supported
by the fireplace in any degree.
Support the vertical portion of the venting
system every 8 feet (2.4m) above the fireplace
vent outlet. One method of support is by utiliz-
ing field-provided support straps (conventional
plumber's tape). Secure the plumber's tape to
the framing members with nails or screws.
Loop
the tape around the vent, securing the ends of
the tape to the framing. If desired, sheet metal
screws #6 x 1/2" length may be used to secure
the support straps to the vent pipe. Refer to
Figure 24C
.
Note: Trim Thimble/
Extension To Desired Length
And Pitch At The Roof Line
14" Min.
Pitched Roof
Pitched Roof
Bow Roof
14" Min.
Outer Pipe Of
Chimney
Outer Pipe Of
Chimney
Outer Pipe Of
Chimney
14" Min.
Firestop
Thimble
Extension
13"
Firestop
Thimble
Firestop
Thimble
Thimble
SV-FSTFE
Figure 24B
Blocking
Support Straps
(Plumber's tape)
8 feet (2.4 m)
Maximum
1" (26 mm)
minimum
clearance to
combustibles
Figure 24C
Another method, where the vent is not adjacent
to a wall, is illustrated in
Figure 24D
. Here, sup-
port straps (96K93) and support plates (96K92)
can be used to support the weight of the vent.
F. Change vent direction to horizontal/inclined
run -
At transition from or to a horizontal/in-
clined run, install the SV4.5E45 and SV4.5E90
elbows in the same manner as the straight vent
sections. The elbows feature a twist section to
allow them to be routed about the center axis
of their initial collar section to align with the
required direction of the next vent run element.
Twist elbow sections in a clockwise direction
only so as to avoid the possiblity of unlocking
any of the previously connected vent sections.
See
Figure 25
.
G.
Continue installation of horizontal/inclined
sections -
Continue with the installation of the
straight vent sections in horizontal/inclined run
as described in
Step C.
Install support straps
every 5' (1.52 m) along horizontal/inclined vent
runs using conventional plumber’s tape.
It is
very important that the horizontal/inclined
run be maintained in a straight (no dips) and
slightly elevated plane in a direction away
from the fireplace
1/4" per foot (20 mm per
meter) of horizontal vent
.
Use a carpenter’s
level to measure from a constant surface and
adjust the support straps as necessary.
It is important to maintain the required clear-
ances to combustibles: 1" (26 mm) at all sides
for all vertical runs; and 3" (77 mm) at the
top, 1" (26 mm) at sides, and 1" (26 mm) at
the bottom for all horizontal/inclined runs.
Figure 25
SV4.5E90
(90
°
Elbow)
8-1/8"
(206 mm)
Swivel Joint
(360
°
swivel)
4-13/16"
(122 mm)
SV4.5E45
(45
°
Elbow)
Swivel Joint
(360
°
swivel)
f i r e - p a r t s . c o m
