Our airflow and comfort notes 161

A well-maintained air conditioning system does more than keep a house cool. It helps shape the quality of the air you breathe every hour of the day. That matters more than many homeowners realize, especially in hot, humid climates where the AC runs for long stretches and becomes one of the main systems moving air through the house. When an AC system is clean, sealed, balanced, and serviced on schedule, it can reduce the spread of dust, moisture, odors, and other contaminant

Filters do the unglamorous work in every serious indoor air quality setup. They sit inside the system, collect the dust, capture the lint, trap the pollen, and hold on to the finer particles that would otherwise keep circulating through a home or building. When people talk about an HVAC air purifier, they often focus on the visible hardware, the sleek cabinet, the UV lamp, the smart controls, the upgraded return grille. In practice, though, the filter choice usually determi