Montigo R320 - Manual (Page 10)

Figure 3. Fireplace installation, (Rough Frame-In dimensions).
Framing Dimensions
Model Q R U
R-Series R320* 55" 47" **23¾"†
R-Series R420* 67" 47" **23¾"†
Determine the height of the platform based on where you want the
bottom edge of the glass to be, see figure 1 or 1a for unit dimensions.
Maintain minimum ceiling height shown in table. Build fireplace frame
as shown in figure 3.
Q (Opening)
R
(Opening)
U
3/4”
Plywood
Drywall
or Equiv.
Platform
** See Figure 1 or 1a.
† U is 29" for straight out the back vent run installations.
Raised Installation:
Maximum
Platform Height
Minimum Required
Ceiling Height
24" 8'
48" 10'
Figure 2b. Clearances for straight rear vented installation with PVHEX58-300.
24"
610
38 34 "
983
18 14 "
463
PVHFL58-300
Stud Wall
Rear
Fireplace
Floor
Header
Termination
Mounting
Flange
24"
610
34"
863
8"
203
PVHEX58-300
Stud Wall
Rear
Fireplace
Floor
Header
Termination
Mounting
Flange
Figure 2c. Clearances for straight rear vented installation with PVHFL58-300.
Note: Images are shown without screens for clarity purposes.
However, your fireplace should not be operated without proper
installation of screens.
R320 & R420 Power Vent Indoor Gas Fireplace
Page 10
XG0770 - 150105.1
Installation