HVAC Tips for Allergy Sufferers

For allergy sufferers, the home should be a refuge. Your HVAC system plays a major role in indoor allergen levels.

Understanding HVAC's Role

How HVAC Helps - Filters capture airborne allergens - Humidity control affects dust mites and mold - Air circulation can dilute allergens

How HVAC Can Hurt - Dirty systems spread allergens - Poor filtration recirculates particles - Excess humidity promotes allergen growth

Filtration Strategies

Upgrade Your Filter Move to the highest MERV rating your system can handle. For allergies, target MERV 11-13 minimum.

Change Filters More Often During peak allergy seasons, change monthly instead of quarterly.

Consider Whole-House Air Cleaners Electronic air cleaners or high-capacity media filters can capture smaller particles than standard filters.

HEPA Supplementation Add HEPA air purifiers in bedrooms where you spend the most time.

Humidity Management

Target Range Keep humidity between 35-50%. This level: - Discourages dust mites - Prevents mold growth - Keeps airways comfortable

Dehumidification If humidity runs high, ensure your AC is properly sized and running long enough to dehumidify.

Humidification If winter heating dries air below 30%, a humidifier helps. But don't overdo it—too much humidity creates other problems.

Duct Considerations

Professional Cleaning If you haven't had ducts cleaned and notice allergy symptoms related to HVAC operation, cleaning may help.

Seal Leaks Leaky ducts in attics or crawlspaces can pull in allergens and distribute them throughout your home.

Operational Strategies

Run the Fan Running your HVAC fan continuously (or periodically) filters air even when not actively heating or cooling.

Keep Windows Closed During high pollen days, keep windows closed and rely on your HVAC for air exchange.

Maintain Your System Annual maintenance keeps coils clean and the system working efficiently.

Seasonal Timing

Before Allergy Season - Change filter - Have system maintained - Clean registers and returns

During Peak Season - More frequent filter changes - Keep windows closed - Run fan more often