Air Plenums/Combustible Items

New construction, building renovations or modifications to the electrical and mechanical systems may result in the installation of plastic pipe that cannot meet the minimum combustibility requirements defined in the Mechanical Code.

FyreWrap® 0.5 Plenum Insulation

FyreWrap 0.5 Plenum Insulation offers an alternative to complete combustible item replacement, often resulting in significant cost and time savings. It is a high temperature single-layer insulation blanket that is used to wrap the combustible items in the plenum area. It is an alternative to removal and replacement of the combustible item with compliant non-combustible versions by preventing flame propagation and smoke development in the plenum area.


Specifications on various FyreWrap® Duct Insulation systems are available in several formats, which are listed below:

Submittal Sheets

Contractor submittal sheets for various Fyrewrap® products/systems are listed below:

Listings and Certifications

Description Test Standards (.pdf)
Pipe or Conduit Assembly  UL 1887 UNI-BI 20-03
Cable Assembly  UL 1887 UNI-BI 20-04
Surface Burning Characteristics ASTM E84 and UL 723 UL File R14514


Description Link (.pdf) Link (.dwg)
General Installation Detail FP-389 FP-389

Canadian Documentation

FyreWrap products are listed and labeled for the Canadian market and comply with the National Building Code of Canada and required fire test standards.

FyreWrap documentation specifically for Canada is listed below.

Refer to the product Safety Data Sheet (SDS) for recommended work practices and other product safety information.

For additional information on products, properties and performance, typical applications, or to identify the recommended product for your application, see the product information sheet listed above or contact the Unifrax Fire Protection Application Engineering Department at 716-768-6298.