Austin's Specific IAQ Challenges
Mountain cedar pollen (Juniperus ashei) is Austin's most notorious air quality event. Cedar season runs from late November through February, with peak counts in December and January that regularly reach levels considered "extremely high."
Oak and other spring pollens follow cedar season, with high counts from March through April.
Mold is an increasing concern in Austin homes due to humidity swings. Homes that experience moisture intrusion can develop mold problems that affect indoor air quality year-round.
Wildfire smoke has become a more frequent concern, with smoke from West Texas and New Mexico wildfires affecting Austin air quality several times per year.
What Your HVAC System Can Do
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Your HVAC system's primary IAQ tool is the air filter. A MERV 11–13 filter will capture the majority of pollen particles, including cedar and oak pollen. During peak cedar season, running your system in fan-only mode can help filter indoor air even when the temperature doesn't require active cooling.
UV air purifiers installed in the air handler can reduce mold and bacteria growth on the evaporator coil. Whole-house air purifiers can meaningfully improve indoor air quality for pollen and particulates, look for systems with AHAM or ASHRAE certifications.
What Your HVAC System Can't Do
Your HVAC system cannot effectively address VOCs from building materials and cleaning products without specialized activated carbon filtration. It also cannot address moisture problems caused by structural issues, address the source first.
Practical Recommendations for Austin Homeowners
During cedar season, upgrade to a MERV 11 filter and check it weekly. Keep windows closed and run the system in fan mode when pollen counts are high. For general IAQ improvement, a UV air purifier installed in the air handler is a reasonable $200–$400 investment.
