GMES8 GCES8 Installation Instructions
12
P
OSSIBILITY
OF
PROPERTY
DAM AGE
,
PERSONAL
INJURY
OR
DEATH
DAM AGING
CONDENSATION
CAN
OCCUR
INSIDE
M ASONRY
CHIM NEYS
W HEN
A
SINGLE
FAN
-
ASSISTED
C
ATEGORY
I
APPLIANCE
(80% AFUE
FURNACE
)
IS
VENTED
W ITHOUT
ADEQUATE
DILUTION
AIR
. D
O
NOT
CONNECT
AN
80%
FURNACE
TO
A
M ASONRY
CHIM NEY
UNLESS
THE
FURNACE
IS
COM M ON
VENTED
W ITH
A
DRAFT
HOOD
EQUIPPED
APPLIANCE
OR
THE
CHIM NEY
IS
LINED
W ITH
A
M ETAL
LINER
OR
T
YPE
B
M ETAL
VENT
. A
LL
INSTALLATIONS
USING
M ASONRY
CHIM NEYS
M UST
BE
SIZED
IN
ACCORDANCE
W ITH
THE
APPROPRIATE
VENTING
TABLES
. I
F
AN
80%
FURNACE
IS
COM M ON
VENTED
W ITH
A
DRAFT
HOOD
EQUIPPED
APPLIANCE
,
THE
POTENTIAL
FOR
CONDENSATION
DAM AGE
M AY
STILL
EXIST
W ITH
EXTREM ELY
COLD
CONDITIONS
,
LONG
VENT
CONNECTORS
,
EXTERIOR
CHIM NEYS
,
OR
ANY
COM BINATION
OF
THESE
CONDITIONS
.
T
HE
RISK
OF
CONDENSATION
DAM AGE
IS
BEST
AVOIDED
BY
USING
M ASONRY
CHIM NEY
AS
A
PATHW AY
FOR
PROPERLY
SIZED
M ETAL
LINER
OR
T
YPE
B
M ETAL
VENT
.
WARNING
Wash
Clay Tile Size: 8" x 8" x12"
(Each x 24" Length)
1/2" to 1" Air Space
Second Floor
First Floor
Attic Floor
Roof Line
Throat
Damper
Breech
Clean Out
Fan Assisted
Forced Air
Furnace
Natural Draft
Wate r Heater
Wate r Heater
Vent Connector
Basement Floor
F. A .F. Vent
Connector
Typical Multiple Flue Clay Tile Chimney
CHECKLIST SUM M ARY
This checklist serves as a summary of the items to be checked
before venting an 80+ furnace into a masonry chimney. In addi-
tion, we recommend that a qualified serviceman use this check-
list to perform a yearly inspection of the furnace venting system.
This checklist is only a summary. For detailed information on each
of the procedures mentioned, see the paragraph referenced with
each item.
Proper Chimney
Termination?
(Check 1)
Chimney channel
free of solid and
liquid fuel
appliances?
(Check 2)
Change venting
arrangements
(Fix 2)
Crown in good
condition
(Check 3)
Rebuild crown
(Fix 3)
and/or Reline
(Fix 4)
Reline
(Fix 4)
Reline
(Fix 4)
Cleanout free of
debris?
(Check 4)
Liner in good
condition?
(Check 5)
Reline
(Fix 4)
Dilution air
available?
(Check 6)
Complete the
installation.
(Check 7)
CHECK 1 - PROPER CHIM NEY TERM INATION.
A masonry chimney used as a vent for gas fired equipment must
extend at least three feet above the highest point where it passes
through the roof. It must extend at least two feet higher than any
portion of a building within a horizontal distance of 10 feet. In
addition, the chimney must terminate at least 3 feet above any
forced air inlet located within 10 feet. The chimney must extend at
least five feet above the highest connected equipment draft hood
outlet or flue collar.
If the chimney does not meet these termination requirements,
but all other requirements in the checklist can be met, it may be
possible for a mason to extend the chimney. If this will not be
practical, see Fix 1.