5
Building Heating Appliance Chimneys
are suitable for use with Building Heating
Appliances and Low Heat Appliances as
described in the Chimney Selection Chart of
National Fire Protection Association (NFPA)
Standard NO. 211.
uL 103 1400°F Chimney Listing:
Under this category, models DIS and DAS
have been determined suitable for venting
flue gases at temperatures not exceeding
760°C (1400°F) under continuous operating
conditions from gas, liquid, oil or solid
fuel fired appliances. Also complies with
brief operation (maximum 10 minutes) at
temperatures not exceeding 906°C (1700°F).
As such, it is suitable for use with ovens
and furnaces as described in the Chimney
Selection Chart of NFPA No. 211, in addition
to other applications.
uL 103 positive pressure Listing:
Under this category, models DIS and DAS have
been determined suitable for use at a maximum
of 60 inch water column internal pressure.
uLC-C959 540°C and 760°C Industrial
Chimneys Listing:
Under this category, models DIS and DAS
have been determined suitable for venting
flue gases at temperatures not exceeding
760°C (1400°F) under continuous operating
conditions from gas, liquid, oil or solid
fuel fired appliances. Also complies with
brief operation (maximum 10 minutes) at
temperatures not exceeding 980°C (1800°F).
uL 1978 grease Ducts Listing (DIS only):
DuraVent model DIS chimney is tested in
accordance with UL 1978 Standard and
approved for Grease Duct applications when
installed in accordance with these installation
instructions and National Fire Protection
Association standard “NFPA 96, Standard for
Ventilation Control and Fire Protection of
Commercial Cooking Operations”.
SurrounDIngS / EnCLoSurE
DuraVent models DIS and DAS chimney are
primarily intended to be used in fire resistive
noncombustible surroundings or installed
unenclosed. They are not intended for use in
one or two family residences.
CautIon
Do not enclose this chimney in a chase
or passageway of ordinary wood or other
combustible material
Where the chimney extends through any
zone of a building (outside that in which the
heating appliance connected to it is located),
it shall be provided with an enclosure having
a fire resistance rating equal to or greater
than that of the floor, wall or roof assemblies
through which it passes.
DuraVent models DIS and DIS chimney
may penetrate a combustible floor, wall
or roof using the appropriate parts and
openings sizes. See section D “Roof & Wall
Penetration” for more details.
Where, according to local code, no chase
enclosure is necessary, models DIS and DAS
chimney may be placed adjacent to walls of
combustible construction at the clearance
specified on each chimney section and
in the individual listing; see “CLEARANCES”.
Contact local building or fire officials about
restrictions and installation inspection
requirements in your area.
grease Ducts (DIS only)
1. Model DIS grease ducts are primarily
intended for installation in noncombustible
surroundings or in unenclosed installations.
2. Where model DIS grease ducts are installed
in an open room and an enclosure is not
required, the minimum clearance to adjacent
combustible walls shall be as shown in this
section (see “CLEARANCES”). The ducting
