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.

Double wall rectangular grease duct.

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. 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. 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. 2g grease duct systems are tested and listed to ul 1978 and ul 2221.

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. Duraduct kex is the largest listed kitchen exhaust duct system in the industry. Single wall grease duct is etl listed to ul standard 1978 grease ducts and can ulc s662. 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.

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. Double wall grease duct is etl listed to ul standard 1978 and ul standard 2221 grease duct enclosure assemblies. 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 liner shall be of the specified materials thickness and density of the contractors request.

Duraduct kex is a pre manufactured and non combustible double wall kitchen exhaust duct system. This provides some additional characteristic to the duct as well as allowing a few more insulation options. Double wall factory built grease duct is ideal for use in applications where reduced clearance or zero inch clearance to combustibles is needed. All pipe models are ul 1978 grease duct rated to their relative clearance to combustibles single wall double wall air or blanket insulated.