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864 TRV 31K CF - Framing Dimensions - Standard
Max.
Header
Depth
3-1/2"
(89mm)
Min.
Enclosure
Height
48"
(1220mm)
Do not build
into the
fireplace
enclosure
Rear Vent
Center
30-3/4"
(781mm)
45"
(1143mm)
43"
(1093mm)
17602168 - 9/23/21
HINT: place the fireplace so the center
line is at least 5" (127mm) from both
vertical framing members at the rear (this
allows the vent to pass through the
framing without modfications)
Vent Clearances 8" (203mm) dia. Vent:
3" (76mm) above
1" (25mm) to sides
1" (25mm) below
Dark Shaded Framing
for Firestop in Rear
Vent Installations Only
38"
(965mm)
25-3/4"
(654mm)
22" (559mm) Standard Facing
(drywall contacts side of fireplace)
22-1/2" (572mm) Submerged Facing
(drywall butts non-comb. facing)
Page 25
IDB1256
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