{"product_id":"16-1-4x21-1-2x1-air-filter","title":"16 1\/4x21 1\/2x1 Aerostar Air Filter","description":"The 16 1\/4 x 21 1\/2 x 1 Aerostar is sized for a nominal opening that's one of the harder filter dimensions to source through retail channels. Actual size is 16 1\/2\" x 21 1\/2\" x 3\/4\". Custom and semi-custom HVAC installations often spec dimensions like this where the return opening doesn't match a standard nominal size. Three MERV grades cover the residential range. MERV 8 for baseline dust, lint, and pollen filtration. MERV 11 for pet households and mild allergy concerns. MERV 13 for fine particulate capture - smoke, bacteria, virus carriers, wildfire particulate. Pleated synthetic media construction with an electrostatic charge handles the filtration work. The pleats provide substantially more surface area than a flat fiberglass filter would offer at the same nominal size, which is what gets you the 60-to-90-day service interval in typical residential conditions. The electrostatic charge improves capture of sub-micron particles where mechanical filtration alone reaches its physical limits. Manufactured by Con-Air Industries in Orlando, Florida. Cardboard frame, reinforced to hold shape under blower suction. Custom and odd-size returns benefit from precise dimensional matching - a filter even 1\/4 inch off-spec leaves a gap where unfiltered air can bypass the media entirely. This filter is sized to fit without modification.","brand":"Aerostar","offers":[{"title":"MERV 8 \/ 6","offer_id":41901659848858,"sku":"P80S.0116D21H-6","price":56.3,"currency_code":"USD","in_stock":true},{"title":"MERV 11 \/ 2","offer_id":41901659685018,"sku":"P15S.0116D21H-2","price":29.99,"currency_code":"USD","in_stock":true},{"title":"MERV 13 \/ 2","offer_id":41901659717786,"sku":"P25S.0116D21H-2","price":31.99,"currency_code":"USD","in_stock":true},{"title":"MERV 8 \/ 4","offer_id":41901659750554,"sku":"P80S.0116D21H-4","price":44.99,"currency_code":"USD","in_stock":true},{"title":"MERV 11 \/ 4","offer_id":41901659783322,"sku":"P15S.0116D21H-4","price":57.99,"currency_code":"USD","in_stock":true},{"title":"MERV 13 \/ 4","offer_id":41901659816090,"sku":"P25S.0116D21H-4","price":59.99,"currency_code":"USD","in_stock":true},{"title":"MERV 8 \/ 2","offer_id":41901659652250,"sku":"P80S.0116D21H-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"MERV 11 \/ 6","offer_id":41901659881626,"sku":"P15S.0116D21H-6","price":82.99,"currency_code":"USD","in_stock":true},{"title":"MERV 13 \/ 6","offer_id":41901659914394,"sku":"P25S.0116D21H-6","price":89.99,"currency_code":"USD","in_stock":true},{"title":"MERV 8 \/ 12","offer_id":41901659947162,"sku":"P80S.0116D21H-12","price":104.9,"currency_code":"USD","in_stock":true},{"title":"MERV 11 \/ 12","offer_id":41901659979930,"sku":"P15S.0116D21H-12","price":149.99,"currency_code":"USD","in_stock":true},{"title":"MERV 13 \/ 12","offer_id":41901660045466,"sku":"P25S.0116D21H-12","price":159.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0591\/6937\/4362\/files\/16Dx21Hx1_MERV8_6pk_4580876f-ce44-4ff5-bc96-c461469e2165.png?v=1788749236","url":"https:\/\/myairfiltersdeliveredeals.com\/products\/16-1-4x21-1-2x1-air-filter","provider":"Air Filters Delivered","version":"1.0","type":"link"}