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Ask The Expert Answers: DP rating

What's the Difference Between Design Pressure, Performance Grade, and Performance Class?

Standards in the door and window industry are constantly evolving due to changes in technology, building codes and rating system performance requirements. This has led to some confusion around the differences between Design Pressure, Performance Grade, and Performance Class.

Tags: AAMA, design pressure, DP rating, performance class, performance grade, window testing

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