Product review (5 stars): You can do this yourself
Weltman Plumbing wanted to charge me alomost $200.00 for the replacement fileter and to install it. I ordered it and installed it myselft and saved about $180.00. Filter works perfectly. If you have a different humidifier, just do a Google search to get the information on the model # needed and instructions on how to replace the filter. It took me less than 1 minute.