In an earlier post, I asked if anyone had good things to say about whole house humidifers. Didn't get any bites. Got looking around and came up with this site: http://www.iallergy.com/ seems like really good prices and shipping rates. I put an order in today for some replacement filters. They seem to have about anything you might need. Sure beats shopping around from store to store, or buying some generic thing that you have to trim to fit.