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CLEARANCE
Security Models DCL, DIS PRO and DAS PRO are primarily intended to be used in a
non-combustible surrounding. Only Model DIS PRO and DAS PRO can be used for either
combustible or non-combustible surroundings. When installed in an open room where
enclosure is not required, the chimney may be located at a minimum clearance to
adjacent combustible walls in accordance with Table 1. The chimney may be located
in corners formed by two combustible constructions (walls, floor, ceiling, supports, etc.)
NOTE: The clearance distance with the wall is the distance between the wall and the
Inner V-Band (for Model DCL) or the Outer Band BSE (for Model DIS Pro and DAS Pro).
See Figure 1 for the clearance distance.
For non combustibles construction, maintain clearance as required for installation access
for inspection or per local code. In buildings more than one story in height and in one-story
buildings where the roof-ceiling assembly is required to have a fire resistance rating, the
duct must be enclosed in a continuous enclosure from the lowest fire-rated ceiling or
floor, through any concealed spaces, to or through the roof to maintain the integrity of the
fire separations required by the applicable building code provisions. If the building is less
than 4 stories in height, the enclosure shall have a fire resistance rating of not less than 1
hour. If the building is 4 stories or more in height, the enclosure shall have a fire resistance
rating not less than 2 hours.
Security Models DCL, DIS PRO and DAS PRO chimneys may penetrate a combustible
floor, wall, or roof using the appropriate parts and openings sizes. See section D "Roof
& Wall Penetration" for more details.
NOTE: Do not enclose with combustible materials
In the case of a fire rated enclosure made of non-combustible or limited combustible
construction, the minimum clearance with the Model DCL must be 6" or as required by
local code.
TABLE 1 -
Minimum Air Space CLEARANCE to Unenclosed Combustible
Surroundings (adjacent to maximum of two walls).
Flue
Model
Diameter Ø
(in)
DCL
Ø5 to Ø36
Ø5 to Ø6
Ø7 to Ø14
DAS1
Ø16 to Ø22
Ø24 to Ø30
Ø32 to Ø36
Ø5 to Ø6
Ø7 to Ø14
DIS1
Ø16 to Ø22
(UL 103 Type HT
Ø5 to Ø24 only)
Ø24 to Ø30
Ø32 to Ø36
Ø5 to Ø14
DIS2 & DIS4
Ø16 to Ø30
(UL 103 Type HT
Ø5 to Ø24 only)
Ø32 to Ø36
Dimensions are in inches
Figure 1 - Detail of Clearance Distance for DIS PRO / DAS PRO
Clearance to
Clearance to
Combustible
Non-Combustible
(in)
(in)
18
0
4
0
5
0
6
0
7
0
8
0
1
0
2
0
3
0
4
0
5
0
1
0
2
0
3
0
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
OPENING THROUGH CONSTRUCTION
The following table serves to identify the minimum opening required when installing a
chimney through a floor, wall or roof made of combustible material. See Table 2 and
Figure 2.
TABLE 2 -
Openings in Floor / Wall / Roof for All Models
Flue
Combustible
Duct
Diameter Ø
Roof / Floor /
Model
(in)
Wall (in)
DCL
Ø5 to Ø36
I.D. + 37 1/4"
Ø5 to Ø6
I.D. + 10 3/4"
Ø7 to Ø9
I.D. + 12 3/4"
Ø10 to Ø14
DAS1
Ø16 to Ø22 I.D. + 14 3/4"
Ø24 to Ø30 I.D. + 16 3/4"
Ø32 to Ø36 I.D. + 18 3/4"
Ø5 to Ø6
I.D. + 4 3/4"
Ø7 to Ø9
I.D. + 6 3/4"
Ø9 to Ø14
DIS1
Ø16 to Ø22
I.D. + 8 3/4"
Ø24 to Ø30 I.D. + 10 3/4"
Ø32 to Ø36 I.D. + 12 3/4"
Ø5 to Ø7
I.D. + 6 3/4"
Ø8 to Ø14
DIS2
Ø16 to Ø30
I.D. + 8 3/4"
Ø32 to Ø36 I.D. + 10 3/4"
Ø5 to Ø7
I.D. + 10 3/4"
Ø8 to Ø14
DIS4
Ø16 to Ø30 I.D. + 12 3/4"
Ø32 to Ø36 I.D. + 14 3/4"
Dimensions are in inches
Opening required when installing the models DIS PRO/ DAS PRO
throught a roof floor or wall made of combustible materials.
Figure 2 - Opening for Model DIS PRO and DAS PRO
SYSTEM SIZING
Complete system sizing and capacity information maybe obtained from the "Chimney,
Gas Vent, and Fireplace Systems" chapter of the ASHRAE Handbook (go to www.ashrae.
org for more information). In spite of these general sizing guidelines, it is most important
that the heating appliance, engine or turbine manufacturer's installation instructions
are followed. Not following the equipment manufacturer's instructions may result in
inadequate chimney performance and/or a violation of the equipment manufacturer's
Installation requirements.
Non-Combustible
Roof / Floor / Wall
(in)
Uninstalled
Installed Stacks
Stack (no
(locking bands
locking bands
installed)
installed)
I.D. + 2 1/2"
I.D. + 1 1/8"
I.D. + 4 1/2"
I.D. + 2 3/4"
I.D. + 3 1/2"
I.D. + 4 1/2"
I.D. + 2 3/4"
I.D. + 3 1/2"
I.D. + 6 1/2"
I.D. + 4 3/4"
I.D. + 5 1/2"
I.D. + 10 1/2"
I.D. + 8 3/4"
I.D. + 9 1/2"
4
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