Since 2011, Innovative Dehumidifier Systems has been the pioneer of tankless wall-mounted dehumidifiers. In Wall or On Wall mount, the unit drains into existing plumbing, and can either plug-in or hardwire to electrical. Quiet, energy efficient and low maintenance, the IW25-4 also comes with a bi-polar ion generator to eliminate air pollutants without ozone while the unit runs, eliminating nearly 30 pints/day in 1,500 square feet. Easy to access washable MERV-8 filters and an LED filter maintenance alert make maintenance super easy.