Typical air vs. spike days
- Annual average PM2.5 (8.66 µg/m³) reflects usual daily exposure.
- Worst-day peak PM2.5 (37.26 µg/m³) is what filtration must handle during bad-air events.
Sections below reference one or both metrics on purpose — that is how HVAC vs. portable guidance differs for Manor without contradicting EPA-aligned thresholds.
Biological Load and Dust
Beyond the chemical and particulate data, Manor residents deal with heavy seasonal biological loads. The local landscape produces significant amounts of cedar and ragweed pollen throughout the year. These allergens act as a physical pre-filter for your HVAC system, often coating the surface of your air filter and reducing its efficiency. When the wind picks up across the open areas of Travis County, it carries a mix of soil dust and organic matter. This constant influx of larger particles means your filtration system is under more stress than the PM2.5 numbers alone might suggest.
HVAC Filter Strategy
For homes in this area, I suggest a MERV 13 filter. This rating is necessary to capture the fine particulates that appear during the 37.26 µg/m³ PM2.5 spikes. Since ozone levels also hit 0.0813 ppm, a filter with an activated carbon or charcoal layer is highly recommended to help strip gases from the air. Standard fiberglass filters are insufficient here; they are designed to protect the equipment from large debris, not to protect your lungs from fine particles.
- Replace filters every 60 to 90 days to prevent airflow restriction.
- Check the filter every 45 days if you live near unpaved roads or construction.
- Ensure the filter seal is tight to prevent air bypass.