What is a notable difference between ASTM E3158-18 and CGSB 148.10-2019?

The correct answer highlights variations in accuracy requirements between ASTM E3158-18 and CGSB 148.10-2019. Each of these standards sets different benchmarks for accuracy in testing airtightness, which can significantly affect the reliability of results obtained during a whole-building airtightness test.

The specific accuracy requirements are crucial because they determine how closely the testing results can be expected to reflect true airtightness levels. Higher accuracy requirements ensure that testing methods and equipment are capable of yielding precise measurements, which is essential for assessing building performance effectively.

Understanding these variations can help professionals select the appropriate testing standard based on the specific needs of a project, the regulatory environment, or the desired level of precision in airtightness assessments. Recognizing the implications of these accuracy requirements is vital for any practitioner involved in building airtightness testing to ensure compliance and reliability in results.