18
18-CD29D1-3
Installer’s Guide
Vent only
to outside
Air Inlet
B
A
A (0-2') or greater
B (0-2') or greater
A+B = 2' minimum
UPFLOW FURNACE
SINGLE PIPE VENTING
g
V
D
E
E
V
G
INSIDE
CORNER DETAIL
B
L
V
V
FIXED
CLOSED
OPERABLE
F
B
C
V
FIXED
CLOSED
V
V
V
B
B
B
A
X
J
B
H
I
V
X
K
M
V
VENT TERMINAL
X
AIR SUPPLY INLET
AREA WHERE TERMINAL IS NOT PERMITTED
OPERABLE
h
VENT CLEARANCES
See Tables 9 & 10
MAXIMUM VENT LENGTH:
MODEL
DIRECT VENT (2 PIPE SYSTEM) -
MAXIMUM TOTAL EQUIVALENT FEET FOR
VENT AND INLET AIR PIPES (See Notes)
NONDIRECT VENT (1 PIPE SYSTEM) -
MAXIMUM TOTAL EQUIVALENT FEET FOR
VENT PIPE ONLY (See Notes)
2" PIPE
& FITTINGS
2-1/2" PIPE
& FITTINGS
3" PIPE
& FITTINGS
4" PIPE
& FITTINGS
2" PIPE
& FITTINGS
2-1/2" PIPE
& FITTINGS
3" PIPE
& FITTINGS
4" PIPE
& FITTINGS
*DH1B040A9241A
60
80
100
130
50
80
80
130
*DH1B065A9421A
45
80
100
130
40
80
80
130
*DH1C085A9481A
NOT ALLOWED
80
100
130
NOT ALLOWED
80
80
130
*DH1D110A9601A
NOT ALLOWED
15
60
130
NOT ALLOWED
25
70
130
NOTES:
* - First letter may be "A" or "T"
1. The INLET AIR of one pipe systems require the installation of a 90° elbow (to prevent dust and debris from falling straight into thefurnace) and a 2 foot
horizontal or vertical straight pipe section connected before or after the elbow.
2. DO NOT MIX PIPE DIAMETERS IN THE SAME LENGTH OF PIPE OUTSIDE THE FURNACE CABINET (Except adapters at the top of the furnace).
If different inlet and vent pipe sizes are used, the vent pipe must adhere to the maximum length limit shown in the table above (See Note 7 below for exception).
The inlet pipe can be of a larger diameter, but never smaller than the vent pipe.
3. MAXIMUM PIPE LENGTHS MUST NOT BE EXCEEDED! THE LENGTH SHOWN IS NOT A COMBINED TOTAL, IT IS THE MAXIMUM LENGTH OF EACH
(Vent or Inlet air pipes in two pipe systems).
4. One standard radius 90° elbow is equivalent to 12' of 4" pipe; one SHORT radius 90° elbow is equivalent to 10' of 3" pipe and one LONG radius elbow is
equivalent to 6' of 3" pipe. One SHORT/LONG radius 90° elbow is equivalent to 7½' of 2½" pipe, & 5' of 2" pipe. Two 45° elbows equal one 90°elbow.
5. The termination tee or bend must be included in the total number of elbows. If the BAYAIR30AVENTA termination kit is used, the equivalent length of pipe is 5 feet.
There is zero equivalent length for the BAYVENT200B.
6. Pipe adapters are field supplied.
7. 4" pipe may be reduced to 3" for termination with BAYAIR30AVENTA or BAYVENT200B without additional length restriction.
8. For Canadian applications ONLY, IPEX 196006 may be used for horizontal and vertical terminations. IPEX 081216, IPEX 081218, and IPEX 081219 may only be used for
horizontal vent terminations. Equivalent lengths are IPEX 196009 = 5 feet, IPEX 081216 = 11 feet, IPEX 081218 = 16 feet, and IPEX 081219 = 21 feet.
DOWNFLOW/ HORIZONTAL VENTING TABLE
TABLE 12
Vent only
to outside
Air Inlet
A
A = 2' minimum
DOWNFLOW
FURNACE
