Double Wall Rectangular Grease Duct

Grease duct integral fire rated chase.

Double wall rectangular grease duct.

2g grease duct systems are tested and listed to ul 1978 and ul 2221. Our prefabricated double wall round grease ducts are designed and built for vertical runs and don t require field welding or secondary insulation. Duraduct kex is a pre manufactured and non combustible double wall kitchen exhaust duct system. Single wall grease duct is etl listed to ul standard 1978 grease ducts and can ulc s662.

Zero clearance grease duct models z3 z4 are additionally ul 2221 rated to zero clearance to combustibles and have an integral 2 hour fire rated enclosure not requiring a separate fire rated shaft. Duct requires no on site welding and is leak tested at the factory for quality assurance. In double wall rectangular duct a metal inner liner insures that high airflow velocities cannot separate insulation by pulling away from the duct s outer wall and creating erosion or airflow problems. Duct liner shall be of the specified materials thickness and density of the contractors request.

Double wall grease duct is etl listed to ul standard 1978 and ul standard 2221 grease duct enclosure assemblies. All pipe models are ul 1978 grease duct rated to their relative clearance to combustibles single wall double wall air or blanket insulated. Duraduct kex is the largest listed kitchen exhaust duct system in the industry. 3 or 4 wall thickness with high temperature dense fiber insulation to meet stringent temperature requirements available in both stainless and aluminized steel exteriors small footprint with minimal horizontal slope required 1 16 per foot as compared to field welded wrapped rectangular duct 1 4 per foot.

Double wall factory built grease duct is ideal for use in applications where reduced clearance or zero inch clearance to combustibles is needed. We offers 2 3 and 4 hour blast resistant and fire rated ducts duraducts including zero clearance kitchen grease duct lab exhaust and access doors to allow for cleaning. G series grease duct double wall kitchen exhaust vent 2 ceramic insulated metal fab grease duct products are manufactured in a strictly controlled environment that enhances product precision reliability and safety. Double wall rectangular ducts utilize the same outer metal shell and insulation media as our internally lined rectangular ducts but have an additional metal inner shell between the insulation and the airstream.