Standard Features & Benefits
- ETL Listed to UL Standard 1978 - Grease Ducts and CAN/ULC-S662
- Ideal for use in kitchen ventilation applications where clearance to combustibles and temperature retention in the duct is not a factor
- Diameters range from 8" to 24"
- Duct and accessories are made from stainless steel
- Multiple accessories including 45 degree elbow, 90 and Tees
- Access doors available for clean out
- Transition plates available for duct termination at the curb
- Submittals and duct CAD files
Product Resources
Ordering Parts
For more information on how to order parts for your duct, Click Here »
Approvals
The DW Series has been certified by ITS. This certification mark
indicates that the product has been tested to and has met the minimum
requirements of a widely recognized (consensus) U.S. and Canadian
products safety standard, that the manufacturing site has been audited,
and that the applicant has agreed to a program of periodic factory
follow-up inspections to verify continued performance.
Model DW Series is ETL Listed under file number 3114021, and complies with UL-1978, as well as CAN/ULC-S662.
Standard Features & Benefits
- ETL Listed to UL Standard 1978 and UL Standard 2221- Grease Duct Enclosure Assemblies
- Ideal for use in kitchen ventilation applications where reduced clearance or zero-inch clearance to combustibles is needed
- Duct sections are constructed of an inner wall and outer wall with insulation in between - inner duct is Single Wall (DW Series) and outer shell is Stainless steel
- Inner duct diameters range from 8" to 24"
- Three models are available to meet clearance requirement needs - Model DW-2R, Model DW-3R and Model DW-3Z
- Rated for continuous operation at 500 degrees F and intermittent operation at 2000 degrees F
Grease Duct Clearances
| DUCT MODEL |
INNER DIAMETER (ID) |
OUTSIDE DIAMETER |
CLEARANCE TO COMBUSTIBLES |
CLEARANCE TO NON-COMBUSTIBLES |
| DW-2R |
8" - 16" |
ID+4 |
3/4" |
0" |
| DW-3R |
8" - 24" |
ID+6 |
3/4" |
0" |
| DW-3Z |
8" - 24" |
ID+6 |
0" |
0" |
* 3/4" clearance to combustibles from
the surface of the duct outer shell and zero-inch clearance from
combustibles from the tip of the outer V clamp
- Model 3Z is listed in accordance with Condition A and Condition B of UL Standard 2221 - Condition A represents all installation conditions except for installation within non-ventilated combustible enclosure. Condition B represents installation within a non-ventilated combustible structure.
- Models 2R and 3R are listed in accordance with Condition B of UL Standard 2221 - installation within non-ventilated combustible enclosure
- Duct systems are allowed to penetrate a fire resistance rated floor when using floor support assembly and fire stop kit
Product Resources
Ordering Parts
For more information on how to order parts for your duct, Click Here »
Approvals:
The Double Wall Ductwork Series has been certified by ITS. This
certification mark indicates that the product has been tested to and has
met the minimum requirements of a widely recognized (consensus) U.S.
Product safety standard, that the manufacturing site has been audited,
and that the applicant has agreed to a program of periodic factory
follow-up inspections to verify continued performance.
Model DW-2R, DW-3R AND DW-3Z are ETL Listed under file number
1000082319SAT-006 EEV and complies with UL1978 and UL2221 Standards.