True or False: To ensure accurate results during whole building airtight testing, interior doors should remain open.

In whole-building airtightness testing, it is essential to maintain an accurate representation of the building’s airtightness. Keeping interior doors closed helps to prevent air from bypassing through different areas of the building, which could lead to misleading results. When interior doors are open, air can flow freely between areas that may have different pressure zones, thus skewing the measurement of the building's overall airtightness performance.

Closing the interior doors creates a more controlled environment, allowing for an accurate assessment of how well the building envelope prevents uncontrolled air leakage. Therefore, stating that to ensure accurate results, interior doors should remain open is false, as doing so compromises the accuracy of the test results.