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 Cedar Park without contradicting EPA-aligned thresholds.
Seasonal Load on Filters
Pollen and mold are the hidden loads on your filtration system. In this region, cedar trees and local grasses produce heavy seasonal volumes that settle in ductwork and on cooling coils. The proximity to the Brushy Creek area and local trails means a high volume of biological particulates is constantly being cycled through your home. These allergens often peak just as residents are closing their windows and relying entirely on their HVAC systems.
HVAC Technician Filter Advice
Because PM2.5 peaks exceed 25 µg/m³ and ozone levels reach 0.0757 ppm, I recommend a MERV 13 filter for local homes. This rating is dense enough to capture the fine particulates seen during peak pollution days. To address the ozone spikes, consider a filter with an activated carbon layer, which helps neutralize gases and odors that standard filters miss. Follow these professional maintenance tips:
- Change filters every 60 to 90 days: This prevents the filter from becoming a source of resistance for your blower motor.
- Seasonal checks: During heavy cedar or grass pollen seasons, check the filter at the 45-day mark.
- HEPA Supplementation: Use a standalone HEPA air purifier in high-traffic rooms to assist your central system during peak pollution days.