{"product_id":"filter-king-af21x21x1a-m11-merv-11-air-filter-21x21x1","title":"AF21x21x1A-M11 Merv 11 Air Filter 21x21x1","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe AF21x21x1A-M11 is a MERV 11 pleated air filter designed for residential and light commercial HVAC systems. With a nominal size of 21x21x1 inches and an actual size of 21x21x0.75 inches, this filter fits standard 1-inch filter slots. The MERV 11 rating captures particles including dust, pollen, mold spores, pet dander, and fine dust from construction or renovation work. Each order includes 10 filters, making it practical for seasonal stocking or multi-unit service calls. Pleated media construction provides a larger surface area than fiberglass panels, supporting better airflow balance alongside particle capture.\u003c\/p\u003e\n\u003cp\u003eThis filter suits forced-air HVAC systems in residential homes and light commercial spaces where a mid-range filtration level is appropriate. MERV 11 is a common specification for customers who need better-than-basic filtration without the static pressure penalty of MERV 13 or higher. It is appropriate for systems with standard blower motors in split systems, air handlers, and packaged units using 1-inch filter racks. HVAC technicians often stock these in bulk for recurring maintenance agreements on residential accounts.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eMERV 11 rated — captures dust, pollen, mold spores, and pet dander\u003c\/li\u003e\n  \u003cli\u003eNominal size 21x21x1 inches; actual size 21x21x0.75 inches for proper fit in 1-inch filter racks\u003c\/li\u003e\n  \u003cli\u003ePleated media design increases surface area for improved particle capture and extended service life\u003c\/li\u003e\n  \u003cli\u003ePack of 10 filters for bulk stocking or maintenance agreement use\u003c\/li\u003e\n  \u003cli\u003eSuitable for residential and light commercial forced-air HVAC applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for use in residential and light commercial HVAC systems with standard 1-inch filter racks accepting a nominal 21x21x1 inch filter.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eAir filters should be installed by a qualified HVAC technician or knowledgeable end user following the system manufacturer's service instructions. Always power down the air handler or furnace before replacing the filter. Confirm airflow direction markings on the filter frame align with system airflow before securing the access panel. Filters rated MERV 11 should be inspected every 30 to 60 days and replaced on a schedule appropriate to site conditions such as pets, occupancy level, or construction activity.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMERV Rating\u003c\/strong\u003e: MERV 11\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNominal Size\u003c\/strong\u003e: 21x21x1 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eActual Size\u003c\/strong\u003e: 21x21x0.75 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFilter Thickness\u003c\/strong\u003e: 1 inch\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQuantity per Order\u003c\/strong\u003e: 10 filters\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMedia Type\u003c\/strong\u003e: Pleated\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eStandard Information\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: FILTER\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: AF21x21x1A-M11\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"FILTER","offers":[{"title":"Default Title","offer_id":51716788486450,"sku":"AF21x21x1A-M11","price":16.03,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/7df9ed37da7ecfe5fb32a8b7753bfd10_f0e196b1-0b7c-436f-acc1-427052251bb8.jpg?v=1790917524","url":"https:\/\/voomisupply.com\/products\/filter-king-af21x21x1a-m11-merv-11-air-filter-21x21x1","provider":"Voomi Supply","version":"1.0","type":"link"}