April showers bring May flowers… and itchy eyes, sneezing, coughing, and wheezing.
Many Bay Area/Northern California residents deal with allergies and asthma.
While you can’t control the outdoors, you can reduce indoor allergens.
As pollen rises, it’s the perfect time to prepare your HVAC system to improve indoor air quality—something that directly impacts how you feel at home.
Your HVAC system helps filter particles, control humidity, ventilate, and in some cases, neutralize microbes.
1. Start with your filter – but don’t stop there.
HVAC filters are the first line of defense. As air circulates, it passes through the filter, capturing particles.
Standard filters catch dust and lint. For allergy relief, consider upgrading:
Common MERV Ratings
- MERV 1–4: Dust, lint
- MERV 5–8: Mold spores, pet dander
- MERV 9–12: Fine dust, pollen, some smoke
- MERV 13+: Bacteria, smoke, very fine particles
For most Northern California homes, MERV 11–13 offers a good balance between filtration and airflow.
- High-MERV filters (11–17): Capture smaller particles like pollen and dander
- HEPA filters: Capture 99.97% of particles (may require system compatibility)
- Whole-home purifiers: Added systems that remove a wider range of pollutants
2. Check Airflow
If airflow is weak, even the best filter or purifier won’t help.
Check for:
- Blower (fan) not performing properly
- Restricted return airflow
- Ductwork issues (leaks or disconnected)
- Dirty indoor coil
- Blocked or dusty vents and grilles
3. Clean Your Outdoor Unit
Your outdoor unit collects dirt, leaves, and debris year-round.
Turn off power, remove debris, gently clean around fins, and rinse with a hose. Keep it clear so contaminants don’t make their way inside.
4. Control Humidity Levels
Too much moisture → mold growth.
Too dry → irritated sinuses.
Your AC naturally removes some humidity while cooling.
If levels are still off:
A whole-home dehumidifier helps reduce excess moisture.
A whole-home humidifier adds moisture back when the air is too dry.
Balanced humidity makes a noticeable difference in comfort and air quality.
5. Regular Maintenance
Routine maintenance keeps your system working properly.
A professional tune-up includes cleaning, inspection, and airflow checks—all of which improve air quality.
BONUS TIPS:
- Keep windows closed on high-pollen days
- Change filters more often during allergy season
- Shower and change after being outdoors
- Run the fan to keep air circulating and filtered
Staying ahead of allergy season doesn’t have to be complicated. A clean system and regularly changed filters go a long way.
