Installation
900608-00 01/2019
Innovative Hearth Products
MHD40 Series Multi-View Direct-Vent Gas Fireplaces
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE
13
Gas Line
Center of gas line
is 3” (76 mm)
up from floor.
*41-1/2
(1054)
***48-1/2
(1232)
26-3/4
(679)
11-3/8
(267)
Dimension A
Secure Vent
®
- 47-1/8 (1197)
Secure Flex
®
- 47-3/4 (1213)
7
(178)
5-1/8
(130)
12-1/8
(308)
10-1/2
**22-3/4
(578)
LibraST
(See-Through)
VENT FRAMING -
TOP VENT WITH
ONE 90º ELBOW
VENT FRAMING -
REAR VENT WITH
NO ELBOWS
inches (millimeters)
7
(178)
5-1/8
(130)
12-1/8
(308)
6-1/4
(159)
A
Minimum Framing
Stud Size is 2x4
*This dimension can be reduced to 41” (1041 mm). This results in 0” (0 mm)
clearance between framing and unit framing spacers. (The 41-1/2” dimension permits
easier fireplace installation, if unit is installed after framing is erected).
**This dimension based on 5/8” drywall.
For 1/2” drywall use 23”.
***Provide Additional Space For
Side Vent
Seal Cap
If Installing Against A Solid Wall
LibraPF
(Peninsula)
Gas Line
Center of gas line
is 3” (76 mm)
up from floor.
*41-1/2
(1054)
***43-5/8
(1108)
26-3/4
(679)
11-3/8
7
(178)
5-1/8
(130)
12-1/8
(308)
VENT FRAMING -
TOP VENT WITH
ONE 90º ELBOW
VENT FRAMING -
REAR VENT WITH
NO ELBOWS
inches (millimeters)
7
(178)
(130)
(308)
6-1/4
(159)
A
Minimum Framing
Stud Size is 2x4
(267)
(289)
**22-3/4
(578)
Dimension A
Secure Vent - 47-1/8 (1197)
Secure Flex - 47-3/4 (1213)
*This dimension can be reduced to 41” (1041 mm). This results in 0” (0 mm)
clearance between framing and unit framing spacers. (The 41-1/2” dimension permits
easier fireplace installation, if unit is installed after framing is erected).
**This dimension based on 5/8” drywall.
For 1/2” drywall use 23”.
***Provide Additional Space For
Side Vent
Seal Cap
If Installing Against A Solid Wall
10-1/2
12-1/8
5-1/8
Figure 14
Figure 13
FIREPLACE FRAMING SPECIFICATIONS
Figure 12 - Nailing Flanges and Floor Nailing Tabs
MHD40ST
(See Through)
MHD40PF
(Peninsula)
Turn tabs down and secure to the floor with
8d nails or other appropriate fasteners
on all sides of the unit which do not have
viewing glass panels.
LibraST SHOWN
(LibraPF - NO NAILING FLANGES
ON END WITH GLASS PANEL)
LibraCL SHOWN
(FOR LibraCR VIEW, INTERCHANGE SIDES)
Remove these two screws and
use them when installing
the nailing flanges.
Nailing Flanges
Note: The nailing flanges, combustible members and screw heads located in areas directly adjacent to the nailing
flanges, are EXEMPT from the 1/2” clearance to combustible requirements for the firebox outer wrapper.
Combustible framing may be in direct contact with the nailing flanges and may be located closer than 1/2” from
screw heads and the firebox wrapper in areas adjacent to the nailing flanges. Frame the opening to the exact
dimensions specified in the framing details of this manual.
See Through SHOWN
(Peninsula - NO NAILING FLANGES
ON END WITH GLASS PANEL)
NOTE: The nailing flanges, combustible members and screw heads located in areas directly adjacent to the nailing flanges, are EXEMPT from the 1/2” clear-
ance to combustible requirements for the firebox outer wrapper. Combustible framing may be in direct contact with the nailing flanges and may be located
closer than 1/2” from screw heads and the firebox wrapper in areas adjacent to the nailing flanges. Frame the opening to the exact dimensions specified in
the framing details of this manual.
f i r e - p a r t s . c o m
