This is a question that has been coming up more and more recently for me. When I install a humidifier, people want to know how much water it uses. Not how much it delivers, but how much waste is trickling down the drain. Short of actually doing the measurements myself, which seems like work, I don't know what to do.
I've read through all the manufacturer literature, checked all over the WWW and I can NOT find a simple statement such as: "The average flow-thru humidifier uses 'X' gallons of water per day, delivers 'Y' and therefore the water wasted is 'X-Y'.
It's a conspiracy. I'm positive. And if someone here doesn't know, I'm getting a measuring cup and a stopwatch, so help me.
HARD DATA NEEDED BEFORE I HAVE TO THINK FOR MYSELF. LOL