Best Seller | 11.5X11.5X1 (Actual Size) Accumulair Titanium 1-Inch Filter (Merv 13) (4 Pack) in White | 6 H x 12.25 W in | Wayfair FI06X12.25A_4 The Accumulair Titanium is the highest efficiency Accumulairfilter on the market. Given an APR 2250 filter rating, this filter is a high-efficiency filter that captures microscopic allergens smaller than 1 micron! This means that this filter removes a... more | | $97.99 $54.99 FREE shipping go to store |