Unvented Attic Fire Testing based on Oxygen Depletion

The attached document is a letter regarding the potential problems related to oxygen depletion fire testing. If you have any questions, please contact me to discuss. Regards, Deer Ridge Consulting, Inc. Roger V. Morrison, PE, RRC President Office: 276-755-9162 Mobile: 336-429-7922 Fax: 866-441-1054 www.deer-ridge-consulting.com 505 Deer Ridge Lane Ararat, VA 24053

 As a Professional Engineer and Registered Roof Consultant, I am obligated to conduct myself and my business in a manner that, among other things, holds paramount the safety, health and welfare of the public. Additionally, I am obligated to advise my clients and appropriate building authorities when, in my opinion and best professional judgement, actions may endanger life or property.

It is with this commitment that I am advising all of my clients in the Spray Polyurethane Foam Industry of an unnamed attic fire test protocol that, in my opinion and best professional judgement, poses a danger to life and property. The protocol in question is a proprietary and non-consensus procedure, the details of which have not been publicly revealed. However, from information that I have been able to garner from a variety of sources, it is apparent that the protocol employs a simulated unvented attic test module and that the primary mode of fire suppression is oxygen depletion.