Morgan Thermal Ceramics worked with UL Underwriter’s Laboratories Inc. to certify a new installation method for grease duct enclosures used in commercial construction.
The new system, an update to the existing classification, results in a 33% space saving. To obtain UL listing for the modified installation method, the company conducted extensive fire performance testing in accordance with ASTM E 2336.
The improved installation method is part of a complete system that includes all materials and the way the materials are installed. The wrapping system uses Morgan Thermal Ceramics’ FireMaster FastWrap XL products, which are installed using compression joints at all seams on both layers of a 2-layer grease duct system. Also included is the new FireMaster FastDoor XL UL-listed access door for grease ducts, which provides a safe and easy way to gain access to kitchen ducts for cleaning and inspection.
The system can be used in commercial construction and is expected to be widely used by mechanical HVAC contractors, insulation, mechanical, and general contractors, as well as duct designers and architects.
Other enclosures on the market use a minimum of 3-inch overlaps of blankets on seams or joints. The new system’s tight butt seam joint saves on material use, because there is no need for the double material thickness for the overlap. BD+C