What defect related to whole house fans involves the physical operation of louvers?

The defect related to whole house fans that specifically involves the physical operation of louvers is the issue where some or all of the louvers do not operate properly. This defect can significantly impact the effectiveness of the whole house fan in ventilating and cooling the living space. If the louvers are damaged or stuck, they will not open or close as intended, preventing proper airflow into and out of the house.

When louvers function correctly, they should allow air to flow freely into the house when the fan is operating, and close when the fan is off to prevent drafts and outdoor air intrusion. Therefore, if the louvers are not operational, the fan’s ability to perform its primary function of ventilation is compromised. This leads to inefficiencies and can contribute to increased energy costs as the house may rely more on air conditioning or heating systems to maintain comfortable temperatures.

Furthermore, defective louvers can lead to issues with air quality, moisture control, and overall comfort in the home, making it essential to address any operational problems with the louvers promptly.