What is the maximum allowable pressure for single and two-point testing as specified in GCSB 149.10 - 2019?

What is the maximum allowable pressure for single and two-point testing as specified in GCSB 149.10 - 2019?

• A. 55 Pa
• B. 50 Pa +/- 3 Pa
• C. 60 Pa +/- 3 Pa
• D. 70 Pa +/- 3 Pa

Answer: (B)

The maximum allowable pressure for single and two-point testing, as specified in GCSB 149.10 - 2019, is recognized as 50 Pa +/- 3 Pa. This specification is crucial for ensuring consistency and reliability in testing airtightness across different buildings and scenarios. The ±3 Pa tolerance allows for minor fluctuations during testing, providing some flexibility while maintaining accuracy in the assessment of a building's airtightness. Using this specified pressure range is important because it establishes a standardized method for evaluating the performance of building envelopes in terms of air leakage. Adhering to these guidelines ensures that results are comparable and that buildings meet the required energy efficiency and indoor air quality standards. In the context of the other options, they represent pressures outside the defined specification for this testing method, which could lead to inconsistencies in results or misinterpretation of a building's performance.

The maximum allowable pressure for single and two-point testing, as specified in GCSB 149.10 - 2019, is recognized as 50 Pa +/- 3 Pa. This specification is crucial for ensuring consistency and reliability in testing airtightness across different buildings and scenarios. The ±3 Pa tolerance allows for minor fluctuations during testing, providing some flexibility while maintaining accuracy in the assessment of a building's airtightness.

Using this specified pressure range is important because it establishes a standardized method for evaluating the performance of building envelopes in terms of air leakage. Adhering to these guidelines ensures that results are comparable and that buildings meet the required energy efficiency and indoor air quality standards.

In the context of the other options, they represent pressures outside the defined specification for this testing method, which could lead to inconsistencies in results or misinterpretation of a building's performance.