IMPORTANT UPDATE: After 1 year or so of solid use, You need to open each one of the heads and clean the gunk from inside of them with Windex OR sooner if it starts to slow down the amount of steam it puts out. You just need some paper towels / Windex and lightly dab / wipe over and over until the black gunk is gone and the springs are shinny again. The disc's can have black circle marks on the back of them without issues.Temperature is -8f outside and humidity inside is 20% in this 2500 square foot home.Container $5Water filter here on amazon. $304 computer fans for $20.Total $180 and we have a whole house humidifier.2 hours of running this and we are at 47% humidity. I can feel the difference in every cell in my body.We have 2 $50 humidifiers and they could barely get one room to 35%. This is doing the entire house really fast.You can't see by the picture but it shoots the mist 6 feet in the air. We are very happy with this purchase.