I purchased the Filterbuy 20x25x5 Merv 11 filter for my Lennox furnace. The quality appears comparable to the filter supplied by Lennox when the furnace was installed last year at a significantly lower price. To date I see no issues with the unit.
I typically buy Aprilaire 410 filters for my house and they fill the entire area made for the filter. These filters I bought here seem very loose. Perhaps when the system is running it seals in there, but im not really sure.
Its a little to soon soon to rate a filter however i am concerned about the he noise Ive had since I started using the filters. There is a big difference in the construction of the filters. Would appreciate your thoughts on this problem.