Guest guest Posted October 15, 2005 Report Share Posted October 15, 2005 Hi , I found another place with filters that may have a size for your school and higher than a MERV 11. They have both commercial and consumer filters. Their best furnace is called a HELPA and I am not sure how exactly is converts to a MERV rating, but it looks to be somewhere around a MERV 14 to MERV 16 from what I can determine based on particle removal efficiency. Hope they can make or have your size. Check out the link: http://www.airkontrol.com/ Fletch Quote Link to comment Share on other sites More sharing options...
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