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This is the filter that ships on a range of older Carrier and Bryant residential systems, and the OEM-branded refill is one of the more expensive consumables in the Carrier parts catalog given the odd nominal dimensions. Aerostar's pleated equivalent meets the dimensional spec without modification. MERV 8 covers standard household filtration: dust, lint, pollen. MERV 11 handles pet households and most common allergen loads. MERV 13 captures fine particulates including smoke, bacteria, and virus carriers - the grade for households with respiratory issues. Pleated synthetic media with an electrostatic charge built into the fibers handles the filtration. The pleats provide substantially more surface area than a flat fiberglass filter would offer at the same nominal size, extending service life to a 60-to-90-day window in typical residential conditions. The electrostatic charge catches sub-micron particles where the physical weave alone reaches its limits. Manufactured in the USA by Con-Air Industries, Orlando, Florida. Cardboard frame, reinforced to maintain shape under blower suction. 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Designed to work with most home and office AC and furnace systems with compatible intake vent sizes, filtering out dust, pollen, bacteria, and other airborne particles. 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That tighter actual size is what filter manufacturers have used for decades, and it's why measuring your existing filter rather than your return opening is the only reliable way to verify fit. Available in MERV 8 for standard household dust and pollen, MERV 11 for pet owners and mild allergy households, and MERV 13 if you're filtering for smoke, fine particulates, or virus-sized aerosols. Each grade uses the same pleated synthetic construction with an electrostatic charge baked into the media. The pleats are what give this filter its capacity - significantly more filter media is folded into the same frame depth compared to a flat fiberglass alternative, which translates to longer service intervals before pressure drop becomes a concern. Manufactured in Orlando, Florida by Con-Air Industries. Plan on a 60-to-90-day change interval for MERV 8 and 11 in typical residential use, or 30 to 60 days for MERV 13 if your home runs pets, frequent cooking, or sits in a wildfire-prone region.","brand":"Aerostar","offers":[{"title":"MERV 8 \/ 6","offer_id":41901603782810,"sku":"P80S.011218-6","price":65.99,"currency_code":"USD","in_stock":true},{"title":"MERV 11 \/ 2","offer_id":41901603586202,"sku":"P15S.011218-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"MERV 13 \/ 2","offer_id":41901603651738,"sku":"P25S.011218-2","price":29.99,"currency_code":"USD","in_stock":true},{"title":"MERV 8 \/ 4","offer_id":41901603684506,"sku":"P80S.011218-4","price":45.99,"currency_code":"USD","in_stock":true},{"title":"MERV 11 \/ 4","offer_id":41901603717274,"sku":"P15S.011218-4","price":51.99,"currency_code":"USD","in_stock":true},{"title":"MERV 13 \/ 4","offer_id":41901603750042,"sku":"P25S.011218-4","price":56.99,"currency_code":"USD","in_stock":true},{"title":"MERV 8 \/ 2","offer_id":41901603553434,"sku":"P80S.011218-2","price":23.99,"currency_code":"USD","in_stock":true},{"title":"MERV 11 \/ 6","offer_id":41901603815578,"sku":"P15S.011218-6","price":74.99,"currency_code":"USD","in_stock":true},{"title":"MERV 13 \/ 6","offer_id":41901603848346,"sku":"P25S.011218-6","price":81.99,"currency_code":"USD","in_stock":true},{"title":"MERV 8 \/ 12","offer_id":41901603881114,"sku":"P80S.011218-12","price":125.99,"currency_code":"USD","in_stock":true},{"title":"MERV 11 \/ 12","offer_id":41901603913882,"sku":"P15S.011218-12","price":142.99,"currency_code":"USD","in_stock":true},{"title":"MERV 13 \/ 12","offer_id":41901603946650,"sku":"P25S.011218-12","price":155.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0591\/6937\/4362\/files\/aero_sq_front_b37ddcd0-bd52-41aa-ab9e-d34f7bef88b3.jpg?v=1780008799"},{"product_id":"12x20x1-air-filter","title":"12x20x1 Aerostar Air Filter","description":"Need a 12x20x1 that actually fits your return? This Aerostar comes in at 11 1\/2\" x 19 1\/2\" x 3\/4\", matching the real opening in most furnace and air handler returns where a nominal 12x20x1 is specified. The half-inch undersize on each dimension is industry standard and keeps the filter from wedging in the grille track. Three MERV options let you match the filter to what your household actually needs. MERV 8 covers basic dust, pollen, and lint at the lowest static pressure. MERV 11 captures pet dander, smoke residue, and finer allergens. MERV 13 takes care of wildfire smoke, bacterial particles, and the sub-micron range. The construction is pleated electrostatic media in a cardboard frame, manufactured by Con-Air Industries in Orlando. The electrostatic charge gives the filter a measurable advantage at catching particles smaller than the physical weave would otherwise stop. Pleated media holds substantially more debris than flat panel filters, so a single 12x20x1 Aerostar typically lasts 60 to 90 days in a household running standard MERV 8 or 11 grades. Higher MERV 13 grades clog faster and want a change closer to every 30 to 60 days under similar conditions.","brand":"Aerostar","offers":[{"title":"MERV 8 \/ 6","offer_id":41901604176026,"sku":"P80S.011220-6","price":54.99,"currency_code":"USD","in_stock":true},{"title":"MERV 11 \/ 2","offer_id":41901604012186,"sku":"P15S.011220-2","price":22.99,"currency_code":"USD","in_stock":true},{"title":"MERV 13 \/ 2","offer_id":41901604044954,"sku":"P25S.011220-2","price":25.99,"currency_code":"USD","in_stock":true},{"title":"MERV 8 \/ 4","offer_id":41901604077722,"sku":"P80S.011220-4","price":37.99,"currency_code":"USD","in_stock":true},{"title":"MERV 11 \/ 4","offer_id":41901604110490,"sku":"P15S.011220-4","price":43.99,"currency_code":"USD","in_stock":true},{"title":"MERV 13 \/ 4","offer_id":41901604143258,"sku":"P25S.011220-4","price":49.99,"currency_code":"USD","in_stock":true},{"title":"MERV 8 \/ 2","offer_id":41901603979418,"sku":"P80S.011220-2","price":19.99,"currency_code":"USD","in_stock":true},{"title":"MERV 11 \/ 6","offer_id":41901604208794,"sku":"P15S.011220-6","price":62.99,"currency_code":"USD","in_stock":true},{"title":"MERV 13 \/ 6","offer_id":41901604241562,"sku":"P25S.011220-6","price":71.99,"currency_code":"USD","in_stock":true},{"title":"MERV 8 \/ 12","offer_id":41901604274330,"sku":"P80S.011220-12","price":98.99,"currency_code":"USD","in_stock":true},{"title":"MERV 11 \/ 12","offer_id":41901604307098,"sku":"P15S.011220-12","price":119.99,"currency_code":"USD","in_stock":true},{"title":"MERV 13 \/ 12","offer_id":41901604339866,"sku":"P25S.011220-12","price":136.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0591\/6937\/4362\/files\/aero_sq_front_91018e34-98bf-47c0-a220-0b02e2408c6d.jpg?v=1780009011"},{"product_id":"12x16x1-air-filter","title":"12x16x1 Aerostar Air Filter","description":"The Aerostar 12x16x1 pleated air filter delivers clean air by replacing your air system’s vent intake filter. Designed to work with most home and office AC and furnace systems with compatible intake vent sizes, filtering out dust, pollen, bacteria, and other airborne particles. 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The smaller actual size is intentional and standard across the filter industry, giving the filter room to slide into the grille without binding. Pick your MERV based on what you're actually trying to catch. MERV 8 covers everyday dust, lint, and pollen at the lowest airflow resistance. MERV 11 handles pet dander, smoke, and most household allergens. MERV 13 traps fine particulates including smoke from wildfires, bacteria, and virus-carrying droplets. Higher MERV means more filtration but also more static pressure on your blower, so MERV 13 is best suited to systems built within the last 10 to 15 years with adequate return ducting. The pleated electrostatic media provides several times the surface area of a basic fiberglass filter, which is why this filter outlasts cheap throwaways even at higher MERV grades. Made in the USA by Con-Air Industries, the same facility that's been manufacturing Aerostar filters for over a decade. Expect a service life of 60 to 90 days under typical residential conditions.","brand":"Aerostar","offers":[{"title":"MERV 8 \/ 6","offer_id":41901607583898,"sku":"P80S.011020-6","price":49.5,"currency_code":"USD","in_stock":true},{"title":"MERV 11 \/ 2","offer_id":41901607420058,"sku":"P15S.011020-2","price":33.08,"currency_code":"USD","in_stock":true},{"title":"MERV 13 \/ 2","offer_id":41901607452826,"sku":"P25S.011020-2","price":34.62,"currency_code":"USD","in_stock":true},{"title":"MERV 8 \/ 4","offer_id":41901607485594,"sku":"P80S.011020-4","price":41.16,"currency_code":"USD","in_stock":true},{"title":"MERV 11 \/ 4","offer_id":41901607518362,"sku":"P15S.011020-4","price":58.12,"currency_code":"USD","in_stock":true},{"title":"MERV 13 \/ 4","offer_id":41901607551130,"sku":"P25S.011020-4","price":59.64,"currency_code":"USD","in_stock":true},{"title":"MERV 8 \/ 2","offer_id":41901607387290,"sku":"P80S.011020-2","price":27.48,"currency_code":"USD","in_stock":true},{"title":"MERV 11 \/ 6","offer_id":41901607616666,"sku":"P15S.011020-6","price":60.24,"currency_code":"USD","in_stock":true},{"title":"MERV 13 \/ 6","offer_id":41901607649434,"sku":"P25S.011020-6","price":73.14,"currency_code":"USD","in_stock":true},{"title":"MERV 8 \/ 12","offer_id":41901607682202,"sku":"P80S.011020-12","price":88.8,"currency_code":"USD","in_stock":true},{"title":"MERV 11 \/ 12","offer_id":41901607714970,"sku":"P15S.011020-12","price":108.6,"currency_code":"USD","in_stock":true},{"title":"MERV 13 \/ 12","offer_id":41901607747738,"sku":"P25S.011020-12","price":131.28,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0591\/6937\/4362\/files\/aero_sq_front_b481b4c5-865f-4b3d-a051-21cc208e763d.jpg?v=1780009015"},{"product_id":"12x30x1-air-filter","title":"12x30x1 Aerostar Air Filter","description":"Picking a 12x30x1 means you've got a long, narrow return - common on older furnaces and certain horizontal air handler installs. The actual size of this Aerostar is 11 1\/2\" x 29 1\/2\" x 3\/4\", so it'll seat properly in a nominal 12x30x1 grille without forcing the frame. Three MERV grades match the filter to the household. MERV 8 for baseline dust and pollen at lowest airflow restriction. MERV 11 for households with pets, smokers, or mild allergies. MERV 13 for fine particulate filtration including smoke, bacteria, and virus-sized aerosols. Construction is electrostatic pleated synthetic media in a reinforced cardboard frame. The pleats provide the surface area; the electrostatic charge handles particles too small for the weave to catch mechanically. Manufactured in Orlando, Florida by Con-Air Industries. The pleated design means this filter outlasts flat fiberglass throwaways by a wide margin, even at higher MERV grades. Service life runs 60 to 90 days for MERV 8 and 11 in typical residential conditions, shorter for MERV 13 under heavy load. If you're replacing a fiberglass filter for the first time, expect this pleated version to feel noticeably more substantial in your hand - that's the additional media doing the work.","brand":"Aerostar","offers":[{"title":"MERV 8 \/ 6","offer_id":41901608861850,"sku":"P80S.011230-6","price":68.99,"currency_code":"USD","in_stock":true},{"title":"MERV 11 \/ 2","offer_id":41901608698010,"sku":"P15S.011230-2","price":29.99,"currency_code":"USD","in_stock":true},{"title":"MERV 13 \/ 2","offer_id":41901608730778,"sku":"P25S.011230-2","price":32.99,"currency_code":"USD","in_stock":true},{"title":"MERV 8 \/ 4","offer_id":41901608763546,"sku":"P80S.011230-4","price":47.99,"currency_code":"USD","in_stock":true},{"title":"MERV 11 \/ 4","offer_id":41901608796314,"sku":"P15S.011230-4","price":56.99,"currency_code":"USD","in_stock":true},{"title":"MERV 13 \/ 4","offer_id":41901608829082,"sku":"P25S.011230-4","price":62.99,"currency_code":"USD","in_stock":true},{"title":"MERV 8 \/ 2","offer_id":41901608665242,"sku":"P80S.011230-2","price":24.99,"currency_code":"USD","in_stock":true},{"title":"MERV 11 \/ 6","offer_id":41901608894618,"sku":"P15S.011230-6","price":81.99,"currency_code":"USD","in_stock":true},{"title":"MERV 13 \/ 6","offer_id":41901608927386,"sku":"P25S.011230-6","price":89.99,"currency_code":"USD","in_stock":true},{"title":"MERV 8 \/ 12","offer_id":41901608960154,"sku":"P80S.011230-12","price":131.99,"currency_code":"USD","in_stock":true},{"title":"MERV 11 \/ 12","offer_id":41901608992922,"sku":"P15S.011230-12","price":155.99,"currency_code":"USD","in_stock":true},{"title":"MERV 13 \/ 12","offer_id":41901609025690,"sku":"P25S.011230-12","price":170.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0591\/6937\/4362\/files\/aero_sq_front_9c43a09d-a661-4d34-912d-23a0fdb7e4d7.jpg?v=1780009023"},{"product_id":"12x36x1-air-filter","title":"12x36x1 Aerostar Air Filter","description":"The Aerostar 12x36x1 pleated air filter delivers clean air by replacing your air system’s vent intake filter. Designed to work with most home and office AC and furnace systems with compatible intake vent sizes, filtering out dust, pollen, bacteria, and other airborne particles. 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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\/aero_sq_front_7d9cff93-adb9-4c6f-8841-b39cc21ec43f.jpg?v=1780008857"},{"product_id":"16x21x1-air-filter","title":"16x21x1 Aerostar Air Filter","description":"The Aerostar 16x21x1 pleated air filter delivers clean air by replacing your air system’s vent intake filter. 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MERV 13 in this depth wants a 30-to-60-day change interval - higher filtration grades reach their pressure-drop limit faster as captured debris builds up across the filter face. 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Custom-size returns benefit from precise dimensional matching - this filter is built to the OEM specification without modification, which is what prevents the air bypass gaps that defeat higher MERV grades.","brand":"Aerostar","offers":[{"title":"MERV 8 \/ 6","offer_id":41902207598746,"sku":"P80S.0121H21H-6","price":85.02,"currency_code":"USD","in_stock":true},{"title":"MERV 11 \/ 2","offer_id":41902207434906,"sku":"P15S.0121H21H-2","price":46.54,"currency_code":"USD","in_stock":true},{"title":"MERV 13 \/ 2","offer_id":41902207467674,"sku":"P25S.0121H21H-2","price":24.99,"currency_code":"USD","in_stock":true},{"title":"MERV 8 \/ 4","offer_id":41902207500442,"sku":"P80S.0121H21H-4","price":59.6,"currency_code":"USD","in_stock":true},{"title":"MERV 11 \/ 4","offer_id":41902207533210,"sku":"P15S.0121H21H-4","price":89.4,"currency_code":"USD","in_stock":true},{"title":"MERV 13 \/ 4","offer_id":41902207565978,"sku":"P25S.0121H21H-4","price":39.41,"currency_code":"USD","in_stock":true},{"title":"MERV 8 \/ 2","offer_id":41902207402138,"sku":"P80S.0121H21H-2","price":40.94,"currency_code":"USD","in_stock":true},{"title":"MERV 11 \/ 6","offer_id":41902207631514,"sku":"P15S.0121H21H-6","price":124.14,"currency_code":"USD","in_stock":true},{"title":"MERV 13 \/ 6","offer_id":41902207664282,"sku":"P25S.0121H21H-6","price":57.29,"currency_code":"USD","in_stock":true},{"title":"MERV 8 \/ 12","offer_id":41902207697050,"sku":"P80S.0121H21H-12","price":153.36,"currency_code":"USD","in_stock":true},{"title":"MERV 11 \/ 12","offer_id":41902207729818,"sku":"P15S.0121H21H-12","price":223.44,"currency_code":"USD","in_stock":true},{"title":"MERV 13 \/ 12","offer_id":41902207762586,"sku":"P25S.0121H21H-12","price":108.56,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0591\/6937\/4362\/files\/aero_sq_front_27966610-c647-44c4-bb54-9aa7e5c98ebe.jpg?v=1780008895"},{"product_id":"21-1-4x23-1-4x1-air-filter","title":"21 1\/4x23 1\/4x1 Aerostar Air Filter","description":"These 21.25x23.25x1 air filters are right-sized for your needs. 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MERV 13 in this depth wants a 30-to-60-day change interval because higher filtration grades reach their pressure-drop limit faster than lower MERV options.","brand":"Aerostar","offers":[{"title":"MERV 8 \/ 6","offer_id":41902209269914,"sku":"P80S.012430-6","price":90.99,"currency_code":"USD","in_stock":true},{"title":"MERV 11 \/ 2","offer_id":41902209106074,"sku":"P15S.012430-2","price":56.99,"currency_code":"USD","in_stock":true},{"title":"MERV 13 \/ 2","offer_id":41902209138842,"sku":"P25S.012430-2","price":60.99,"currency_code":"USD","in_stock":true},{"title":"MERV 8 \/ 4","offer_id":41902209171610,"sku":"P80S.012430-4","price":68.99,"currency_code":"USD","in_stock":true},{"title":"MERV 11 \/ 4","offer_id":41902209204378,"sku":"P15S.012430-4","price":74.99,"currency_code":"USD","in_stock":true},{"title":"MERV 13 \/ 4","offer_id":41902209237146,"sku":"P25S.012430-4","price":89.99,"currency_code":"USD","in_stock":true},{"title":"MERV 8 \/ 2","offer_id":41902209073306,"sku":"P80S.012430-2","price":53.99,"currency_code":"USD","in_stock":true},{"title":"MERV 11 \/ 6","offer_id":41902209302682,"sku":"P15S.012430-6","price":97.99,"currency_code":"USD","in_stock":true},{"title":"MERV 13 \/ 6","offer_id":41902209335450,"sku":"P25S.012430-6","price":103.99,"currency_code":"USD","in_stock":true},{"title":"MERV 8 \/ 12","offer_id":41902209368218,"sku":"P80S.012430-12","price":168.99,"currency_code":"USD","in_stock":true},{"title":"MERV 11 \/ 12","offer_id":41902209400986,"sku":"P15S.012430-12","price":184.99,"currency_code":"USD","in_stock":true},{"title":"MERV 13 \/ 12","offer_id":41902209433754,"sku":"P25S.012430-12","price":194.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0591\/6937\/4362\/files\/aero_sq_front_1cb84185-c556-4ca7-80af-0b32ddbe3035.jpg?v=1780009031"},{"product_id":"19-7-8x21-1-2x1-carrier-replacement-filter-by-aerostar","title":"19 7\/8 x 21 1\/2 x 1 Carrier Replacement Filter by Aerostar","description":"These 19.875x21.5x1 air filters are right-sized for your needs. 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This Aerostar measures 20 7\/8\" x 20 7\/8\" x 3\/4\" actual, sized for a nominal 21x21x1 slot. Pleated synthetic media construction with an electrostatic charge built into the fibers. MERV 8 handles standard household dust and pollen. MERV 11 captures pet dander, smoke residue, and most common allergens. MERV 13 takes care of fine particulates including bacteria, virus-sized aerosols, and wildfire smoke. The pleats provide substantially more surface area than a flat fiberglass filter would offer at the same nominal size, which is what extends the service life to 60 to 90 days under typical residential conditions. The electrostatic charge improves capture of sub-micron particles - the size range where mechanical filtration runs out of options. Manufactured in the USA by Con-Air Industries, Orlando, Florida. Cardboard frame, reinforced for shape retention under blower suction. MERV 13 in this depth reaches its pressure-drop limit faster than lower grades and wants a change closer to every 30 to 60 days under typical load. If anyone in the household has asthma or chronic respiratory issues, MERV 13 is worth the more frequent change schedule for the improvement in indoor air quality.","brand":"Aerostar","offers":[{"title":"MERV 8 \/ 6","offer_id":41902212382874,"sku":"P80S.012121-6","price":69.36,"currency_code":"USD","in_stock":true},{"title":"MERV 11 \/ 2","offer_id":41902212219034,"sku":"P15S.012121-2","price":35.38,"currency_code":"USD","in_stock":true},{"title":"MERV 13 \/ 2","offer_id":41902212251802,"sku":"P25S.012121-2","price":41.82,"currency_code":"USD","in_stock":true},{"title":"MERV 8 \/ 4","offer_id":41902212284570,"sku":"P80S.012121-4","price":50.68,"currency_code":"USD","in_stock":true},{"title":"MERV 11 \/ 4","offer_id":41902212317338,"sku":"P15S.012121-4","price":49.99,"currency_code":"USD","in_stock":true},{"title":"MERV 13 \/ 4","offer_id":41902212350106,"sku":"P25S.012121-4","price":68.89,"currency_code":"USD","in_stock":true},{"title":"MERV 8 \/ 2","offer_id":41902212186266,"sku":"P80S.012121-2","price":29.7,"currency_code":"USD","in_stock":true},{"title":"MERV 11 \/ 6","offer_id":41902212415642,"sku":"P15S.012121-6","price":63.89,"currency_code":"USD","in_stock":true},{"title":"MERV 13 \/ 6","offer_id":41902212448410,"sku":"P25S.012121-6","price":94.99,"currency_code":"USD","in_stock":true},{"title":"MERV 8 \/ 12","offer_id":41902212481178,"sku":"P80S.012121-12","price":124.8,"currency_code":"USD","in_stock":true},{"title":"MERV 11 \/ 12","offer_id":41902212513946,"sku":"P15S.012121-12","price":126.99,"currency_code":"USD","in_stock":true},{"title":"MERV 13 \/ 12","offer_id":41902212546714,"sku":"P25S.012121-12","price":187.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0591\/6937\/4362\/files\/aero_sq_front_5deab16c-9a71-4e0f-b448-c8aedfc7d980.jpg?v=1780008916"},{"product_id":"21-1-2x23-3-8x1-air-filter","title":"21 1\/2x23 3\/8x1 Aerostar Air Filter","description":"A 21 1\/2 x 23 3\/8 x 1 nominal return takes a filter sized at 21 1\/2\" x 23 3\/8\" x 3\/4\" actual, which this Aerostar matches exactly. Custom and semi-custom HVAC installations spec dimensions like this when the original return opening doesn't conform to a standard nominal size. MERV 8 covers baseline residential filtration: dust, pollen, lint. MERV 11 handles pet households and mild allergy concerns. MERV 13 captures fine particulates including bacteria, virus carriers, and wildfire smoke - the grade for households with respiratory health concerns. Pleated synthetic media with an electrostatic charge built into the fibers handles the filtration. The pleats provide substantially more surface area than a flat fiberglass filter would at the same nominal size, which is what extends the service life to 60 to 90 days under typical residential conditions. The electrostatic charge catches sub-micron particles where the physical weave alone reaches its limits. Manufactured in the USA by Con-Air Industries at the Orlando, Florida facility. Cardboard frame, reinforced to hold shape under blower suction. Odd-size filters benefit most from dimensional precision because an off-spec filter leaves gaps for unfiltered air to bypass the media, which undermines higher MERV grades.","brand":"Aerostar","offers":[{"title":"MERV 8 \/ 6","offer_id":41902214414490,"sku":"P80S.0121H23F-6","price":55.99,"currency_code":"USD","in_stock":true},{"title":"MERV 11 \/ 2","offer_id":41902214250650,"sku":"P15S.0121H23F-2","price":40.99,"currency_code":"USD","in_stock":true},{"title":"MERV 13 \/ 2","offer_id":41902214283418,"sku":"P25S.0121H23F-2","price":48.99,"currency_code":"USD","in_stock":true},{"title":"MERV 8 \/ 4","offer_id":41902214316186,"sku":"P80S.0121H23F-4","price":44.99,"currency_code":"USD","in_stock":true},{"title":"MERV 11 \/ 4","offer_id":41902214348954,"sku":"P15S.0121H23F-4","price":50.99,"currency_code":"USD","in_stock":true},{"title":"MERV 13 \/ 4","offer_id":41902214381722,"sku":"P25S.0121H23F-4","price":53.99,"currency_code":"USD","in_stock":true},{"title":"MERV 8 \/ 2","offer_id":41902214217882,"sku":"P80S.0121H23F-2","price":30.99,"currency_code":"USD","in_stock":true},{"title":"MERV 11 \/ 6","offer_id":41902214447258,"sku":"P15S.0121H23F-6","price":72.99,"currency_code":"USD","in_stock":true},{"title":"MERV 13 \/ 6","offer_id":41902214480026,"sku":"P25S.0121H23F-6","price":92.99,"currency_code":"USD","in_stock":true},{"title":"MERV 8 \/ 12","offer_id":41902214512794,"sku":"P80S.0121H23F-12","price":109.99,"currency_code":"USD","in_stock":true},{"title":"MERV 11 \/ 12","offer_id":41902214545562,"sku":"P15S.0121H23F-12","price":143.99,"currency_code":"USD","in_stock":true},{"title":"MERV 13 \/ 12","offer_id":41902214578330,"sku":"P25S.0121H23F-12","price":182.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0591\/6937\/4362\/files\/aero_sq_front_b92d6462-f749-4aae-9401-559aa497c14e.jpg?v=1780009115"}],"url":"https:\/\/www.airfiltersdelivered.com\/collections\/all-5-6-inch-filters.oembed?page=8","provider":"Air Filters Delivered","version":"1.0","type":"link"}