Amazon has discounted the Dravonic 21-Pint Dehumidifier to $87.99, a 50% saving on its usual $175.99 price, when shoppers apply the coupon code "Z95HWPXY" as part of the retailer's Back to School sale. The compact appliance is aimed at buyers wanting an affordable way to control humidity in small spaces, such as dorm rooms, bedrooms or gaming dens, without the noise or power draw of a larger whole-house unit.

The device measures 17 by 7 by 12 inches and can remove up to 21 pints, roughly three gallons, of moisture from the air daily. Although the manufacturer claims it can cover spaces up to 1,500 square feet, it is best suited to smaller enclosed rooms, and runs relatively quietly at around 37 decibels on its lowest fan setting. Its 0.4-gallon water tank is fairly small, so it may need frequent emptying in humid conditions unless connected to a drainage hose.