Too much water running through to humidifier

With the Honeywell he220, you will use alot of water, trying to turn down the water will only reduce your amount of humidity in the home, you may be able to adjust it a little but you need to take the cover off and reduce the water flow a little at a time watching the water as it flows across the pad, you just have to make sure the humidifier pad is getting plenty of water across it, to little and you lose your humidification, hope that was helpful to ya, thanks for your question,
mr.grzz

I have a Honeywell HE240. I purchased a 1/4" pressure T valve from Menards for $6.00, cut the 1/4" water line and inserted the T valve in the line then turned the valve to a trickle. It works great. I've used these valves on other problem solving issues so be mindful of oxidation and sometimes they like to stick. There are also 1/4" pvc pressure fitting ball valves that will do the same thing.

I created a simple hack to slow the amount of water flowing through my Honeywell HE250 whole house humidifier. I took a toilet bowl refill tube clip [google it and you'll know what that is] and stuck it onto the internal plastic water line running inside the humidifier. Just like in a toilet bowl, you can cinch that clip way down to slow the amount of water flowing through a plastic water line . Tada! I now have a much slower rate of water flowing through to the humidifier pad--and less wasted water going down the drain. Works great.