Commercial Kitchen Exhaust Duct Insulation

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Commercial kitchen exhaust duct insulation.

They are heavily insulated for zero clearance to combustibles and a two hour fire rated shaft assembly. R 408 30935a 506 2 corrosion protection. Commercial kitchen hood ventilation ducts and exhaust equipment shall be in compliance with nfpa 96 2014 which is the standard of the national fire protection association listed in chapter 15 of the code. Insulation on the duct in the kitchen offers no protection.

We use insulation to mitigate this risk. The zc models are all stainless steel and factory insulated grease duct for use in commercial kitchen exhaust systems which meet the requirements set forth by underwriters laboratories for the ul 2221 standard. The grease hood duct from the ceiling to where it exits the building should be enclosed in a fire rated enclosure or approved fire barrier type insulation see 3m or be listed double wall grease duct see metalfab except if the roof where the duct exits is right above the room hood. All supply and return air ducts and plenums shall be insulated with a minimum of r 5 r 6 insulation when located in unconditioned spaces and a minimum of r 8 insulation when located outside the building.

Unifrax fyrewrap elite 1 5 duct insulation wrap is a flexible enclosure for 1 and 2 hour fire rated commercial kitchen grease ducts range hoods and hazardous exhaust ducts including chemical fume ducts. Case the exhaust duct was not insulated. Therefore it is likely that many commercial cooking exhaust systems do not ex perience significant temperature differences even with non insulated ducts. Leading manufacturer of chimney venting and air distribution products for commercial and residential hvac industries for over 80 years.

A fire in another compartment unrelated to the kitchen could potentially ignite the grease and cause a fire to cascade throughout a building. Fyrewrap elite 1 5 duct insulation is a two layer flexible enclosure for two hour rated commercial kitchen grease ducts. Installed as a two layer system fyrewrap elite 1 5 complies with the international mechanical code imc and uniform mechanical code umc. Inventors of the positive pressure chimney system selkirk products meet and exceed the requirements of codes and other manufacturer products.

Fyrewrap elite 1 5 duct insulation is tested per astm e2336 and is acceptable as an alternate to a traditional fire rated shaft. Insulation is applied to kitchen ducts as they pass through other compartments.