Product review (4 stars): Cheap and effective
We live in Oklahoma and the climate here is so bizarre that there are some months of the year that we need dehumidifiers and other months when a humidifier is what is required.  I have always been quick to catch respiratory infections and the idea of catching Legionnaires' disease does not appeal.  This product contains a benzyl derivative of ammonium chloride and is just what is needed to make sure your humidifier is not spreading harmful product.  Cheap and effective way to avoid a nasty problem.