Direct Vent And Colinear Vent Examples - Empire Comfort Systems FG28BMK(N,P)-1 Installation Instructions Manual

DIRECT VENT AND COLINEAR VENT EXAMPLES

Max Vent Run - 40 ft. Equivalent With Three 90° Elbows
Special Note: The vent terminal 90° elbow and first 90° elbow
off back of the fireplace, when within six inches (15.2 cm),
do not contribute to the overall vent length measurement.
For each 45° elbow installed in the run, the length of the run
MUST be reduced by 1.5 feet (45 cm). Reduce the length of the
run three feet (91.4 cm) for every 90° elbow.
Note: Exhaust must be a
minimum of three inches
above air intake inlet.
Calculation example of vent run maximum 40 feet
Figure 16 displays a two-pipe installation. Because the distance
from the fireplace to the first elbow is more than six inches, the
equivalent length for the first 90° elbow must be add to the total
vent length. The equivalent length of the second 90° elbow also
needs to be added to the total length. The third elbow also needs
to be included. The equivalent length of the PTrap does not need
to be added since it is the termination. The total horizontal vent
length of the flue system is eleven feet, and the total vertical length
is 20 feet. The three 90° elbows are equivalent to 9 feet, bringing
the total to 40 feet.
Note: The exhaust must be a minimum of three inches above the
inlet air pipe. The flue must be at least twelve inches from the roof
line, and it is recommended to be at least twelve inches above the
maximum expected snow level as indicated in Figures 15 through
19.
Note: On horizontal runs, a P.V.C. support clamp needs to be in-
stalled every three feet. No "sags" in horizontal vent runs; water
31793-3-1015
Figure 16
will settle in the pipe.
When installing a colinear horizontal, the minimum vent length
protruding from the outside wall is six inches (15.2 cm) for air in-
take and nine inches for exhaust. See Figure 17.
Note: Horizontal discharge 90° elbow must be pointed downward.
See Figure 17. All horizontal runs require a 1/4" per foot rise to run
condensation back to the fireplace.
Note: All PVC vent run piping can be purchased at a local hard-
ware store. Schedule 40 PVC pipe should be used and cemented.
See page 11. PVVK-SH36 Horizontal Vent Adaptor Kit is available
from Empire Comfort Systems, Inc.
In both vertical and horizontal colinear direct vent applications,
a colinear transition plate model PVCT can be used to minimize
clearances between intake and exhaust pipes.
For horizontal colinear direct venting, exhaust and intake air, cap
pipes with 90º elbows, pointed downward.
Note: The measurement for center to center of the pipes can be
3" to 24" maximum.
Figure 17
Page 17