Final answer:
Pressurization and depressurization tests using the blower door equipment must be performed as part of the Basic Service to measure the air tightness of a building envelope and identify areas of air leakage.
Step-by-step explanation:
The tests using the blower door equipment that must be performed as part of the Basic Service are pressurization and depressurization. These tests are used to measure the air tightness of a building envelope. During pressurization, the blower door fan blows air into the building, while during depressurization, the fan pulls air out of the building. By measuring the airflow and pressure differentials, the blower door can determine the amount of air leakage in the building and identify areas where the air is escaping.
Performing these tests is important for several reasons. It helps identify areas where air leaks are occurring, which can lead to energy loss and higher utility bills. It also helps improve indoor air quality by preventing the infiltration of outside pollutants into the building. Lastly, it can help ensure that a building meets energy efficiency standards and codes.
While a visual inspection may be part of the Basic Service, it is not sufficient to determine the air tightness of a building. Depressurization only or no tests required for Basic Service are not correct options because both pressurization and depressurization tests are necessary.