MERV Ratings & Indoor Air Quality, Explained
A higher MERV catches more allergens — but too high can choke airflow. Here's how to pick the right filter for cedar-fever country.
Reviewed by Joe Martel · 4 min read · Updated June 2026 MERV (Minimum Efficiency Reporting Value) rates how effectively a filter captures airborne particles, from 1 to 16 for residential filters. A higher MERV traps more dust, pollen, and pet dander — important during Central Texas cedar fever season — but a filter that's too restrictive for your system can choke airflow and strain the blower.
Picking the right MERV
- MERV 8–11 — good everyday filtration for most homes.
- MERV 13 — captures fine particles and allergens; great for allergy sufferers if your system supports it.
- MERV 14+ — best paired with systems designed for the added resistance.
Beyond the filter
For homes battling allergens, whole-home solutions — media air cleaners, UV germicidal lights, and fresh-air ventilation — do more than a filter alone. The key is matching filtration to your system's airflow capacity so you improve air quality without hurting efficiency. Explore our indoor air quality services for options.
Struggling with dust or allergies at home? Ask about an IAQ assessment.
Key terms in this article
Sources & further reading
Have a question about your system?
Real humans on the phone, 24/7. Same-day service across Cedar Park and greater Austin — flat-rate pricing, NATE-certified techs.