What is the significance of proper HVAC maintenance for indoor air quality?

Proper HVAC maintenance plays a critical role in indoor air quality primarily by ensuring efficient operation and reducing pollutants. When HVAC systems are regularly maintained, they run more efficiently, which not only optimizes energy use but also helps maintain a balanced environment for occupants.

A well-maintained system can effectively filter out dust, allergens, and other airborne contaminants, which are essential for promoting a healthier indoor atmosphere. Additionally, it helps in controlling humidity levels, preventing the growth of mold and mildew that can arise in poorly maintained systems. By maintaining appropriate humidity and filtration, HVAC systems contribute significantly to reducing respiratory issues and improving overall indoor health.

The other options do not capture the full scope of benefits provided by proper HVAC maintenance. While reducing humidity can be a by-product of good system care, it is only one aspect of a multifaceted approach that includes pollutant reduction and overall efficiency. Allowing for more occupants is not a direct benefit of HVAC maintenance, and preventing repairs, while a potential outcome, does not address the central issue of air quality that maintenance significantly impacts.