8
Table 3 – Maximum Allowable Exposed Vent Pipe Length -- Ft. (M) With and Without Insulation
in Winter Design Temperature Ambient*
FURNACE
SIZE
WINTER DESIGN
TEMPERATURE
°
F
〈°
C)
MAX PIPE
DIAMETER
IN (mm)
WITHOUT INSULATION
FT (M)
WITH 3/8–IN. (10 mm) OR
THICKER INSULATION†
FT (M)
Fixed Capacity
2---Stage
Fixed Capacity
2---Stage
040
20 (--7)
1.5 (38)
51 (16)
---
70 (21)
---
0 (--18)
1.5 (38)
28 (9)
---
70 (21)
---
--20 (--29)
1.5 (38)
16 (5)
---
70 (21)
---
20 (--7)
2 (51)
45 (14)
---
70 (21)
---
0 (--18)
2 (51)
22 (7)
---
70 (21)
---
--20 (--29)
2 (51)
10 (3)
---
58 (18)
---
060
20 (--7)
2 (51)
65 (20)
44 (13)
70 (21)
70 (21)
0 (--18)
2 (51)
35 (11)
21 (6)
70 (21)
70 (21)
--20 (--29)
2 (51)
20 (6)
20 (6)
70 (21)
57 (17)
080
20 (--7)
2 (51)
55 (17)
55 (17)
55 (17)
55 (17)
0 (--18)
2 (51)
48 (15)
30 (9)
55 (17)
55 (17)
--20 (--29)
2 (51)
30 (9)
16 (5)
55 (17)
55 (17)
20 (--7)
2.5 (64)
70 (21)
58 (18)
70 (21)
70 (21)
0 (--18)
2.5 (64)
47 (14)
29 (9)
70 (21)
70 (21)
--20 (--29)
2.5 (64)
28 (9)
14 (5)
70 (21)
67 (20)
100
20 (--7)
2.5 (64)
40 (12)
40 (12)
40 (12)
40 (12)
0 (--18)
2.5 (64)
40 (12)
38 (12)
40 (12)
40 (12)
--20 (--29)
2.5 (64)
38 (12)
21 (6)
40 (12)
40 (12)
20 (--7)
3 (76)
70 (21)
63 (19)
70 (21)
70 (21)
0 (--18)
3 (76)
50 (15)
30 (9)
70 (21)
70 (21)
--20 (--29)
3 (76)
28 (9)
12 (4)
70 (21)
70 (21)
120
20 (--7)
3 (76)
70 (21)
70 (21)
70 (21)
70 (21)
0 (--18)
3 (76)
61 (19)
38 (12)
70 (21)
70 (21)
--20 (--29)
3 (76)
37 (11)
19 (6)
70 (21)
70 (21)
20 (--7)
4 (102)
70 (21)
65 (20)
70 (21)
70 (21)
0 (--18)
4 (102)
48 (15)
26 (8)
70 (21)
70 (21)
--20 (--29)
4 (102)
23 (7)
5 (2)
70 (21)
65 (20)
140
20 (--7)
3 (76)
60 (18)
---
60 (18)
---
0 (--18)
3 (76)
60 (18)
---
60 (18)
---
--20 (--29)
3 (76)
44 (13)
---
60 (18)
---
20 (--7)
4 (102)
70 (21)
---
70 (21)
---
0 (--18)
4 (102)
57 (17)
---
70 (21)
---
--20 (--29)
4 (102)
30 (9)
---
70 (21)
---
* Pipe Length (ft.) specified for maximum pipe Lengths located in conditioned spaces. Pipes located in unconditioned space cannot exceed total allowable pipe
length as specified in the furnace Installation Instructions. Insulation thickness based on R values of 3.5 (Ft.
2
_
hr.)/(Btu in.).
Copyright 2009 CAC / BDP
D
7310 W. Morris St.
D
Indianapolis, IN 46231
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
Catalog No: AG---KGAET---02
Replaces:
AG--KGAET--01
Printed in U.S.A.
Edition Date: 10/09
