What is a common challenge when using high-MERV filters in residential HVAC systems?

Using high-MERV (Minimum Efficiency Reporting Value) filters in residential HVAC systems presents several challenges, one of the most significant being the increased pressure drop affecting airflow. High-MERV filters are designed to capture smaller particles and provide superior filtration efficiency. However, this increased capability often leads to a denser filter material, which creates more resistance to the airflow within the system.

When the airflow is restricted due to the higher pressure drop, the HVAC system has to work harder to maintain adequate air circulation throughout the home. This not only reduces the overall efficiency of the system but can also lead to various operational issues, such as premature wear on the blower motor and increased energy consumption over time as the system compensates for the lowered airflow. Moreover, if the airflow is significantly impeded, it can result in uneven heating or cooling and potentially lead to damage to the HVAC equipment.

In contrast, high-MERV filters do not typically reduce system noise; in fact, depending on the filter design and the system, they might create more noise due to increased airflow turbulence. Additionally, while they offer higher filtration efficiency, the statement about lower filtration efficiency is inaccurate when referring to high-MERV filters.