Empire Comfort Systems MILLIVOLT DVCD FP3-4 Series Installation Instructions Manual page 20

Below Grade Installation
Empire recommends installing a snorkel kit when it is not
possible to meet the required vent terminal clearances of
12 inches (305 mm) above grade level. A snorkel kit allows an
installation depth down to 7 inches (178 mm) below grade level.
The 7 inches (178 mm) is measured from the center of the
horizontal vent pipe as it penetrates through the wall.
Ensure the sidewall venting clearances are observed.
Empire recommends installing a window well with adequate
and proper drainage around the termination area if the
venting system is installed below ground.
3" (76mm)
MINIMUM
PIPE STRAP
48"
(1219mm)
TYPICAL BASEMENT INSTALLATION
ATTENTION
Vinyl Soffit, Vinyl Ceiling, Vinyl Overhang Disclaimer
Clearances are to heat resistant material (i.e. wood, metal). This
does not include vinyl. Empire Comfort Systems will not be held
responsible for heat damage caused from terminating under vinyl
overhangs, vinyl ceilings or vinyl ventilated/unventilated soffits.
Page 20
VENTING FIREPLACE - TOP
COMBUSTIBLE
PROJECTION
18" (457mm)
MINIMUM
12" (305mm)
ABOVE GRADE OR
EXPECTED SNOW LEVEL
Figure 31
Example of possible venting systems using one 90° elbow.
Eight feet is listed as minimum vertical vent run with 20 feet of
maximum horizontal vent run. Vertical dimensions are based on
centerline to centerline of pipe. Horizontal dimensions are based
on centerline of pipe to end of termination.
H
FIRESTOP AT
CEILING LEVEL
IF PENATRATING
CEILING
SEE GRAPH FOR PERMISSIBLE "H" AND "V" DIMENSIONS
V
Figure 32
38712-4-0920