The special Double-wall Zero Clearance products make the most of 3.twenty five” of a singular larger density ceramic fiber insulation between the interior liner and outer jacket. These Zero Clearance versions can also be a two-hour fireplace-rated-resistant enclosure/duct assembly.   Air recirculation needs to be deemed for if a commercial https://commercial-kitchen-extrac35567.develop-blog.com/44215964/commercial-kitchen-extract-systems-things-to-know-before-you-buy