Should You Run Your Humidifier in St. Louis During the Summer Months?

Dan Walsh • April 7, 2024
Table of outdoor temperature and recommended indoor relative humidity percentages.

gold-humidifier-mdAs we step into the warmer months in St. Louis, the question of whether to keep the humidifier humming becomes a topic of much debate. Understanding the balance of humidity in your home is not just about comfort; it also impacts your air conditioner’s efficiency, your health, and even your wallet.

The Case for Humidity Control

Experts, including those at Aprilaire, recommend maintaining indoor humidity levels between 40-60%. This range is the sweet spot for preventing the growth of allergens like mold and dust mites and for keeping wooden fixtures in your home from warping. Too much humidity, on the other hand, can make your air conditioner work overtime, potentially leading to increased energy bills and wear on the system.

St. Louis Summers: Humidity and Your Comfort

St. Louis is known for its hot, muggy summers. A humidifier can play a crucial role in balancing your home’s humidity level, especially if you have air conditioning. An AC unit naturally removes some moisture from the air, which can lead to overly dry conditions indoors. Using a humidifier in moderation can help maintain optimal humidity levels, ensuring your home feels cooler and more comfortable without overburdening your AC.

Impact on Air Conditioning

Running a humidifier in summer can have a direct impact on your air conditioning system. If the humidity level is set too high, your AC will need to work harder to cool and dehumidify your home, potentially leading to ac repair issues. It’s essential to use a humidifier wisely, ensuring it complements rather than competes with your air conditioning.

outdoor temperature to indoor relative humidity from aprilaire
Source: aprilaire.com

Finding the Right Balance

To find the perfect balance, use a hygrometer to monitor your home’s humidity levels actively. Adjust your humidifier accordingly to maintain the recommended 40-60% humidity level. This will not only keep your living environment comfortable but also ensure your AC runs efficiently. Consulting the Aprilaire Relative Humidity Chart can help you determine the ideal settings for your home.

Health and Economic Benefits

Proper humidity levels can reduce the risk of respiratory issues and skin irritation, making your home more comfortable to live in. Additionally, by ensuring your AC operates efficiently, you’re likely to see savings on energy bills, offsetting any costs associated with running a humidifier.

Maintaining your air conditioning system with regular maintenance is key to its efficiency and longevity. Whether you’re debating the use of a humidifier or seeking ways to improve your AC’s performance, AAA Home Services is here to help. Reach out to us for expert advice and support tailored to St. Louis homes.

AAA Home Services electrician installing a ceiling fixture in a home
By AAA Home Services Team • September 26, 2026
From GFCI outlets to ceiling fans, small electrical jobs in O'Fallon homes add up to real safety. Here's what's worth calling a licensed electrician for.
By AAA Home Services Team • September 24, 2026
Sump pump failing signs, testing steps, and lifespan facts for St. Charles County homeowners. Fall is the time to check, before spring flooding season.
AAA technician discussing an appliance repair with a homeowner in a kitchen
By AAA Home Services Team • September 21, 2026
A loud refrigerator at night usually has a fixable cause. Lake St. Louis homeowners, here's what's making the noise and when to call for appliance repair.
AAA Home Services electrician installing a ceiling fixture in a home
By AAA Home Services Team • September 19, 2026
Not sure what happens when an electrician shows up? O'Fallon MO homeowners, here's an honest look at the process from diagnostic to final invoice.
Show More