AMDW Series

Double Wall Grease Duct

Double Wall Grease duct is ideal for use in kitchen ventilation applications where reduced clearance or zero-inch clearance to combustibles is needed. Grease duct is ETL listed to mastandard UL-1978 and UL Standard 2221 and rated for continuous operation at 500° F and intermittent operation at 2000°F. Inner duct diameters range from 8" to 36", with multiple lengths and accessories available.

Double Wall Grease Duct

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 (AMDW Series) and outer shell is Stainless steel
  • Inner duct diameters range from 8" to 36"
  • Three models are available to meet clearance requirement needs - Model AMDW-2R, Model AMDW-3R and Model AMDW-3Z
  • Rated for continuous operation at 500 degrees F and intermittent operation at 2000 degrees F

Clearances

DUCT MODEL INNER DIAMETER (ID) OUTSIDE DIAMETER CLEARANCE TO COMBUSTIBLES CLEARANCE TO NON-COMBUSTIBLES
AMDW-2R 8" - 16" ID+4 3/4" 0"
AMDW-3R 8" - 24" ID+6 3/4" 0"
AMDW-3Z 8" - 36" ID+6 0" 0"
 
  • 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