Beware of different manufacturing sizes!
I searched 20X20X5 filters on the website, assuming that the labeled size would be the actual size. When I went to insert the filter, the actual size was quite a bit larger and it wouldn't go in. I think it needs to be made a little clearer on the website that written size isn't always the true size. To their credit, the customer service rep at Filterbuy explained to me that each manufacturer measures them slightly differently, and to search by make/model in future. I was offered an exchange or credit, which I greatly appreciated. I ended up purchasing a filter elsewhere, but might consider Filterbuy in future due to great customer service. However, be warned to check your sizing before finalizing your order!!