The water tank doesn't hold a gallon of water, leaving approximately 10 ounces of water leftover.
The SPT SU-4010 Dual Mist Humidifier's owner's manual does not specify the exact capacity of the water tank in gallons or ounces. It only…
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SPT Su-4010 Dual Mist Humidifier User Manual — questions & answers
Read product questions and troubleshooting answers linked to SPT Su-4010 Dual Mist Humidifier User Manual.