Installation guide

6. Masonry Chimney Venting
Chimney Inspection
All masonry chimney construction must conform to Standard
ANSI/NFPA 211-2003 and to any state or local codes applicable.
The chimney must be in good condition and a complete chimney
inspection must be conducted prior to furnace installation. If the in-
spection reveals damage or abnormal conditions, make neces-
sary repairs or seek expert help. See "The Chimney Inspection
Chart" Figure 6. Measure inside area of tile-liner and exact height
of chimney from the top of the chimney to the highest appliance
flue collar or drafthood outlet.
Connector Type
To reduce flue gas heat loss and the chance of condensate prob-
lems, the vent connector must be double-wall Type B vent.
Venting Restrictions for Chimney Types
Interior Chimney - has no sides exposed to the outdoors below
the roofline. All installations can be single furnace or common
vented with another draft hood equipped Category ] appliance.
Exterior Chimney - has one or more sides exposed to the out-
doors below the roof line. All installations with a 99% Winter De-
sign Temperature* below 17°F must be common vented only with
a draft hood equipped Category I appliance.
The99%WinterDesignDry-Bulb(db)temperaturesarefoundinthe1993ASHRAE
FundamentalsHandbook,Chapter24,Table1 (UnitedStates)and 2(Canada),or
usethe 99.6%heatingdbtemperaturesfound inthe1997or2001ASHRAEFunda-
Ifa claytile-lined masonry chimney is being used and it is exposed
to the outdoors below the roof line, relining might be required.
Chimneys shall conform to the Standard for Chimneys, Fire-
places, Vents, and Solid Fuel Burning Appliances ANSI/NFPA
211-2003 in the United States and to a Provincial or Territorial
Building Code in Canada (in its absence, the National Building
Code of Canada) and must be in good condition.
U.S.A.- Refer to Sections 13.1.9 or 13.2.20 of the NFGC or the au-
thority having jurisdiction to determine whether relining is required.
If relining is required, use a properly sized listed metal liner,
Type-B vent, or a listed alternative venting design.
This model (*8DNL) is NOT listed for use with Chimney Adapter
kits. A multi-position furnace in the downflow position that is listed
for use with one of the Chimney Adapter Kits NAHAOOIDH or
NAHAOO2DH may be used with a masonry chimney.
Canada (and U.S.A.)-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-
mentalsHandbook,ClimaticDesignInformationchapter,Table1A (UnitedStates)
and 2A (Canada).
CARBON MONOXIDE POISONING, FIRE AND
EXPLOSION HAZARD.
Failure to properly vent this furnace could result in
death, personal injury and/or property damage.
These furnaces are CSA (formerly AGA and CGA
design-certified for venting into exterior clm
tile-lined masonry chimneys with a factory accesso
ry Chimney Adapter Kit. Refer to the furnace rating
31atefor correct kit usage. The Chimney Adapter Kits
are for use with ONLY furnaces having a Chimne_
Adapter Kit number marked on the furnace ratin i
plate.
equipped appliance, and
The combined appliance input rating is less than the maxi-
mum capacity given in Table A, and
The input rating of each space-heating appliance is greater
than the minimum input rating given in Table B for Masonry
Chimneys for the local 99% Winter Design Temperature.
Chimneys having internal areas greater than 38 square
inches require furnace input ratings greater than the input
ratings of these furnaces. See footnote at bottom of Table B,
and
5. The authority having jurisdiction approves.
If all of these conditions cannot be met, an alternative venting de-
sign shall be used, such as a listed chimney-lining system, or a
Type-B vent.
441 01 2314 02 [_