Double Wall Rectangular Grease Duct

Duct liner shall be of the specified materials thickness and density of the contractors request.

Double wall rectangular grease duct.

Our prefabricated double wall round grease ducts are designed and built for vertical runs and don t require field welding or secondary insulation. Not only has this patented ul 2221 classified product been tested for zero clearance to combustibles it eliminates the need for a fire rated chase with its 2 hour fire rating. Double wall factory built grease duct is ideal for use in applications where reduced clearance or zero inch clearance to combustibles is needed. Grease duct integral fire rated chase.

All pipe models are ul 1978 grease duct rated to their relative clearance to combustibles single wall double wall air or blanket insulated. It is rated for 2 hours fire resistance with zero clearance to combustibles and it is compliant with international mechanical code imc national building code of canada nbcc and national fire protection association nfpa codes. 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.

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. Single wall grease duct is etl listed to ul standard 1978 grease ducts and can ulc s662. 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 grease duct is etl listed to ul standard 1978 and ul standard 2221 grease duct enclosure assemblies.

This provides some additional characteristic to the duct as well as allowing a few more insulation options. Duraduct kex is the largest listed kitchen exhaust duct system in the industry. 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. 2g grease duct systems are tested and listed to ul 1978 and ul 2221.