The American Architectural Manufacturers Association (AAMA) has created a document addressing causes and technical issues related to condensation on interior surfaces of fenestration products, comparing the tools available for rating systems for condensation resistance.

“This new AAMA document was developed to provide a single reference source on the three common condensation rating systems for the U.S. and Canada,” says Apogee Enterprises Inc.’s Doug Holmberg, co-chair of the Condensation Ratings Comparison Task Group. “It also provides information on how each rating is calculated for comparing the condensation resistance of products and the differences in the rating systems.”

Steve Strawn of Jeld-Wen, co-chair of the task group, adds that window condensation ratings can be difficult to understand, and that the question has been further complicated by the use of different methods to rate condensation resistance.

“We have attempted to summarize through this document how each of the ratings are calculated and will remind the reader that the results are not directly comparable,” says Strawn. “When comparing products side by side, specifiers should ensure that they are comparing products that have used the same condensation rating method.”

AAMA CRS-15 is available at AAMA’s publication store.

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