The filter works great, no problem with that. It is just so expensive to replace and with two cats and a bunny and two kids with Asthma it should be replace every 4 or 5 months. I live in Canada and by the time I get the filter and pre filter it is almost $100.00. I read such good reviews about the Hunter tower I thought I should give it a try not realizing the cost to keep it going. Bottom line, product is great, too expensive.
I have had my Hunter Air Purifier for 2 1/2 years now and love it. It works great, is very quiet and I have not had one ounce of trouble with it so far. I do hate that I now have to order the filter replacements on-line vs. running in a store to pick one up. None of the stores in my area sell them anymore for some reason but, the HEPA filter only has to be replaced once a year and AMAZON is the cheapiest place I have found online to order one. It is a terrific product and I encourage any animal owner to have one. I have 4 indoor cats and you can NEVER smell their litter box anymore due the having the air purifier!
I bought this filter for a lot less money with Amazon.com than what the manufacturer was asking on their website. Great deal, because hepa filters are expensive to replace.