I've had an AprilAire bypass humidifier for a couple of years, and I'm
really happy with it. Does need a new pad every year, but it doesn't have
the problem of standing water sitting in it. It also came with an automatic
humidistat that regulates the humidity based on outside temps. With the
swings in outdoor temps here in St. Paul, MN, I like not having to fiddle
with a manual humidistat trying to maintain the correct humidity.

Bob