DuraVent DAS1 Manual - Page 5

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Figure 6: Openings for through Floor / Wall / Roof Models

Opening required when installing the Models DAS1, DIS1, DIS2,

DIS4 throught a roof, floor or wall made of combustible materials.

DAS1, DIS1, DIS2, DIS4 made of combustible material

Figure 2 - Opening for Models

Grease Duct – UL1978

Minimum Square OPENING for NON-Fire Rated Floor / Wall /

Roof for different Models

Duct

Flue

Model

Diameter Ø

Combustible

(in.)

Roof / Floor /

DCL

5 to 36

ID + 37 1/4"

ID + 8 3/4"

6 to 11

ID + 10 3/4"

12 to 16

ID + 12 3/4"

DAS1

18 to 22

ID + 14 3/4"

24 to 28

ID + 16 3/4"

30 to 34

ID + 18 3/4"

ID + 20 3/4"

5 to 13

ID + 4 3/4"

14 to 24

ID + 6 3/4"

DIS1

26 to 34

ID + 8 3/4"

ID + 10 3/4"

5 to 16

ID + 2 3/4"

DIS2

18 to 30

ID + 4 3/4"

32 to 36

ID + 6 3/4"

5 to 16

ID + 2 3/4"

DIS4

18 to 30

ID + 4 3/4"

32 to 36

ID + 6 3/4"

5 to 9

DIS3Z

ID + 6 3/4"

10 to 36

Table 2: Openings for through Floor / Wall / Roof – NON-Fire-

Grease Duct – UL1978

CIXPRO SERIES FOR GREASE DUCT UL1978 SUBMITTAL RECORD

DAS1: 0 8 = 0A + 2

DIS1: 08 = 0A + 2

DIS2: 08 = 0A + 4

DIS4: 08 = 0 A + 8

C = 0 B + 3/4

D = C + (2 x Clearance)

See Table for

Opening Dimensions

Outer Band (BSE)

For Models DAS1, DIS1, DIS2, DIS4

Floor

INNER WALL

DCL, DAS1, DIS1, DIS2, DIS4)

OUTER WALL

( DAS1, DIS1, DIS2, DIS4 )

Insulation (Air or Fiber Wool)

DIS PRO

Through

Non-Combustible

But NOT-FIRE-

Wall (in.)

RATED

Roof / Floor / Wall

(in.)

ID + 1 1/4"

ID + 2 3/4"

ID + 4 3/4"

ID + 8 3/4"

ID + 6 3/4"

Rated

CLEARANCE TO COMBUSTIBLE FIRE

RATED

UL 2221

Model DIS3Z is equivalent to a 2 – Hour fire

rated grease duct enclosure system.

DIS3Z is "0" inch clearance to combustible

CLEARANCE TO COMBUSTIBLE (from the outer band -

DIS3Z – 5" TO 36"

Table 3: DIS3Z Clearance to Combustible

Model DIS3Z may penetrate a combustible floor, wall or roof

using the appropriate parts and opening sizes. Refer to the

installation instructions for detailed information.

Whenever the DIS3Z grease duct passes through a fire rated

wall or floor, a DIS3Z Ø TPFK must be used to maintain the

fire rating.

Fire resistance rating: 2 hours (F & T)

FIRE RATED (2-HR) FLOOR PENETRATION

Fig. 7: Through Penetration Firestop fire-rated Floor

Penetration

NOTE:

Must use S-TPFS (Spec Seal Triple S Intumescent

Firestop Sealant – SSS100). Ordered separately

from DIS3ZØTPFK based on duct diameter. Refer

to table 4 for tube coverage.

REV: 0

AUGUST 2017

BSE)