I tested the old whole house humidifier and found that the valve leaked. so I turned it off. I also realized that the old humidifier was missing the element on the inside, so it needed replacing. I came back the next morning to find the leaky valve leaked all over the basement so I went out and bought this new humidifier. It was a relative easy install, and now has humidity control. We keep the house at about 40% humidity. It took around 1 day to stabilize, but now it's nice and comfortable.