Double Wall Grease Duct

Double wall factory built grease duct is ideal for use in applications where reduced clearance or zero-inch clearance to combustibles is needed. Duct requires no on-site welding and is leak tested at the factory for quality assurance.

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  1. ETL Listed to UL Standard 1978 and UL Standard 2221- Grease Duct Enclosure Assemblies
  2. 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
  3. Inner duct diameters range from 8" to 36"
  4. Multiple accessories including 45 degree elbow, 90 and tees
  5. Access doors available for clean out
  6. Transition plates available for duct termination at the curb
  7. Three models are available to meet clearance requirement needs - Model DW-2R, Model DW-3R and Model DW-3Z
  8. Rated for continuous operation at 500 degrees F and intermittent operation at 2000 degrees F
  9. System can be used as a stand-alone duct system or used as part of a fully integrated package designed and pre-engineered for optimum performance
  10. Factory-built duct saves on installation costs
  11. Round duct ensures reduced static pressure, improved acoustics, easier cleaning, faster installation, less insulation when fire-wrapping, and reduced heat gain to the space


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.

Models DW-2R and DW-3R are ETL listed under file number 1000082319SAT-006 EEV and comply with UL1978, UL2221, CAN/ULC-S115, CAN/ULC-S662, and ASTM E814 Standards.

Model DW-3Z is ETL Listed under file number 1000082319SAT-006 EEV and complies with UL1978, UL2221 and CAN/ULC-S144 Standards.


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