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Why Your AC is Not Controlling Indoor Humidity Well

Today it’s more important than ever to maintain proper humidity levels in your home; viruses and bacteria thrive and spread in both very low and very high humidity conditions. Keeping relative humidity levels in your home between 40-60% is best for the health of your family.

Change Speeds

Systems that offer only one fan speed (on or off) can have the same problem as a system that is too large to offer effective humidity control. When it’s time for a new air conditioner, consider upgrading to a modulating/variable fan system for more efficient performance and improved humidity control.

Use Different Thermostat Settings

Using your “fan on” setting on your thermostat will not remove excess humidity. It can actually make humidity issues worse by blowing moisture your unit is trying to remove back into your home.

Adding a whole house dehumidifier or humidifier ensures ideal relative humidity in your home. Dehumidification in the summer prevents the generation and spread of dangerous microorganisms. Humidification in the winter reduces the incidence of airborne virus, bacteria, dust, and other irritants which easily spread in dry air.

Address Air Pressure Issues

Feel a whoosh of air when you open a door or window? Your home could have negative air pressure issues. This happens when pressure attempts to equalize, drawing outside air into your home. If this occurs, talk to an HVAC pro regarding ventilation system changes.

Upgrade Your Old Unit

Systems over 10 years old usually don’t run as efficiently as they used to. When maintenance has been neglected, wear can increase, leading to inconsistent temperatures, inadequate cooling, and poor humidity control. If your older system is struggling to handle your home comfort needs, it may be time to invest in a new system.

Don’t sweat humidity issues in your home. Call 515-965-7272 or email us at

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