Put this in my workroom in the basement where the average humidity stayed at around 72-75.  Total square footage is about 800. I was getting a mold problem.  Plugged in this dehumidifier and it dropped the humidity to 45 in about 4 hours.  It was filling up the tank with water about every 3-4 days, and I quickly got tired of emptying the tank.  I ran a hose from the unit and tapped into an existing drain line.  No longer have to empty the tank.  

I like the wireless that lets me turn the unit on and off when I'm not at home and check the humidity level.