26
441 01 2101 05
Specifications are subject to change without notice.
The Chimney Adapter Kit is a listed alternative venting
system for these furnaces. See the kit instructions for
complete details.
This furnace is permitted to be vented into
a clay tile
−
lined
masonry chimney that is exposed to the outdoors
below the
roof line, provided:
1. Vent connector is Type
−
B double
−
wall, and
2. This furnace is common vented with at least 1 draft
hood
−
equipped
appliance, and
3. The combined appliance input rating is less than the
maximum
capacity given in Table 8, and
4. The input rating of each space heating appliance is
greater
than the minimum input rating given in Table 9
for the local
99% Winter Design Temperature.
Chimneys having internal
areas greater than 38 in
2
(24516 mm
2)
require furnace input
ratings greater than
the input ratings of these furnaces. See
footnote at
bottom of Table 9, and
5. The authority having jurisdiction approves.
If all of these conditions cannot be met, an alternative venting
design shall be used, such as the listed chimney adapter kit
with a
furnace listed for use with the kit, a listed
chimney
−
lining system,
or a Type
−
B common vent.
Inspections before the sale and at the time of installation will
determine the acceptability of the chimney or the need for
repair
and/or (re)lining. Refer to Figure 34 to perform a
chimney inspection.
If the inspection of a previously used
tile
−
lined chimney:
a. Shows signs of vent gas condensation, the chimney
should
be relined in accordance with local codes and
the authority
having jurisdiction. The chimney should
be relined with a
listed metal liner, Type
−
B vent, or a
listed chimney adapter
kit shall be used to reduce
condensation. If a condensate
drain is required by
local code, refer to the NFPA 54 / ANSI Z223.1
−
2012,
Section
12.10 for additional information on
condensate drains.
b. Indicates the chimney exceeds the maximum
permissible
size in the tables, the chimney should be
rebuilt or relined
to conform to the requirements of the
equipment being
installed and the authority having
jurisdiction.
A chimney without a clay tile liner, which is otherwise in good
condition, shall be rebuilt to conform to ANSI/NFPA 211 or be
lined with a UL listed metal liner or UL
listed Type
−
B vent.
Relining with a listed metal liner or Type
−
B
vent is considered
to be a vent
−
in
−
a
−
chase.
If a metal liner or Type
−
B vent is used to line a chimney, no
other
appliance shall be vented into the annular space
between the
chimney and the metal liner.
Exterior Masonry Chimney FAN + NAT
Installations with Type
−
B Double
−
Wall Vent
Connectors
E
NFPA & AGA
Table 8 – Combined Appliance Maximum Input Rating in
Thousands of BTUH per Hour
VENT HEIGHT
FT. (M)
INTERNAL AREA OF CHIMNEY
SQ. IN. (SQ. MM)
12
(7741)
19
(12258)
28
(18064)
38
(24516)
6 (1.8)
74
119
178
257
8 (2.4)
80
130
193
279
10 (3.0)
84
138
207
299
15 (4.5)
NR
152
233
334
20 (6.0)
NR
NR
250
368
30 (9.1)
NR
NR
NR
404
Table 9 – Minimum Allowable Input Rating of
Space
−
Heating Appliance in Thousands of BTUH per
Hour
VENT HEIGHT (FT)
INTERNAL AREA OF CHIMNEY
SQ. IN. (SQ. MM)
12
(7741)
19
(12258)
28
(18064)
38
(24516)
Local 99% Winter Design
Temperature: 17 to 26
_
F (-8 to -3
_
C)
6 (1.8)
0
55
99
141
8 (2.4)
52
74
111
154
10 (3.0)
NR
90
125
169
15 (4.6)
NR
NR
167
212
20 (6.1)
NR
NR
212
258
30 (9.1)
NR
NR
NR
362
Local 99% Winter Design
Temperature: 5 to 16
_
F* (-15 to -9
_
C)
6 (1.8)
NR
78
121
166
8 (2.4)
NR
94
135
182
10 (3.0)
NR
111
149
198
15 (4.6)
NR
NR
193
247
20 (6.1)
NR
NR
NR
293
30 (9.1)
NR
NR
NR
377
Local 99% Winter Design
Temperature: -10 to 4
_
F* (-23 to -16
_
C)
6 (1.8)
NR
NR
145
196
8 (2.4)
NR
NR
159
213
10 (3.0)
NR
NR
175
231
15 (4.6)
NR
NR
NR
283
20 (6.1)
NR
NR
NR
333
30 (9.1)
NR
NR
NR
NR
Local 99% Winter Design
Temperature: -11
_
F (-24
_
C) or lower
Not recommended for any vent configuration.
*The 99.6% heating db temperatures found in the 1997 or 2001 ASHRAE
Fundamentals Handbook, Climatic Design Information chapter, Table 1A
(United States) or the 2005 ASHRAE Fundamentals handbook, Climatic
Design Information chapter, and the CD
−
ROM included with the 2005
ASHRAE Fundamentals Handbook.
