Which aspect is NOT a direct responsibility of the CxT?

The responsibility of monitoring indoor air quality falls within the scope of the commissioning technician's work, as ensuring the proper function of HVAC systems and indoor environments is part of their role. This involves assessing the performance of air handling systems, checking ventilation, and ensuring that indoor conditions are conducive to health and comfort.

Challenging project team dynamics, while not a primary responsibility, can be seen as part of a CxT's role in facilitating effective communication and collaboration among stakeholders. This can involve highlighting potential issues in teamwork that may affect project outcomes, though it is not the CxT's main focus.

Coordinating with construction teams is inherently part of a commissioning technician's duties, as they must work closely with both the construction and engineering teams to ensure systems are installed correctly and function as intended.

Overseeing financial transactions, however, does not fall under the direct responsibilities of a commissioning technician. This duty typically lies with project managers or financial officers, as it involves budgeting, procurement, and financial reporting, which is unrelated to the technical and operational focus of commissioning work. Thus, this makes it the correct answer, as it is not part of the core responsibilities of a CxT.