Review on Lacidoll Large Room Whole-house Humidifier - 1000 sq.ft., 4.2Gal/16L Top Fill Cool Mist Ultrasonic Humidifier - Quiet, 1000mL/h Output with 360° Mist Tube - Ideal for Home, Office, Workshop, Greenhouse, School - White (1 unit) by Debra Decou

Advertising, packaging and instructions for use state that the performance is 1500 ml per hour. But with a timer and a way to measure water in milliliters, you can do a simple check. In the highest mode (turbo) it produces 475 to 500 ml. per hour. (Average over 4 hours) This blatant lie appears to be specific to humidifiers made by brands from a particular country. I have owned 11 different humidifiers over the years and tested them all for actual performance. The brands I can vouch for are Boneco, Elechomes, Winix, Air Innovations and TaoTronics. Time will tell if this Lacidoll block will last long enough to make it a good buy. But why expect it to be durable when they're claiming triple the actual performance? If this is your first humidifier, ignore any claims about how many square feet it "can handle." How much electricity you need per 1,000 square feet is affected by many factors such as: For example, how "tight" your house is, how windy it is, and whether you live in Kansas or Canada. My rule of thumb is for every 1000 sq.ft. need 1000ml. per hour on the bottom up to 2000-2200 ml. per hour on the high side. So plan on having more than one humidifier. In addition, using hard tap water can cause white dust to form and damage the device.