Housekeeping · 실내 습도 관리

Indoor humidity: use a hygrometer and watch for condensation

The US EPA identifies 30–50% relative humidity as an ideal range, with levels below 60% where possible. Read a hygrometer alongside signs of condensation, leaks or mold.

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Humidity changes with season, ventilation and temperature. EPA notes that sustained moisture favors mold and cold windows can collect condensation. A 30–50% reading is a useful guideline, not a guarantee: leaks and localized wet spots still need attention.

Your try-it-at-home checklist

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Place a household hygrometer in a frequently used room away from heaters, humidifier mist or a wet window ledge.
Check relative humidity and temperature at more than one time of day. A single reading does not describe every part of a home.
Compare with EPA's ideal 30–50% guidance and watch whether readings approach or exceed 60% for extended periods.
Also inspect window glass, wall corners and areas behind furniture for droplets, dampness or musty smells.
If humidity is high, run exhaust fans during cooking and showers; ventilate when outdoor air is less humid. Use air conditioning or dehumidifiers where appropriate.
Locate and fix leaks and persistent condensation. Seek appropriate professional help for widespread or recurring mold, and follow humidifier cleaning instructions when humidifying.

Your try-it-at-home checklist

Further reading

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