{"product_id":"nordic-pure-20x25x5-lennox-x6673-x6675-replacement-filter-merv-10","title":"Nordic Pure 20x25x5 Lennox X6673 X6675 Replacement Filter - MERV 10","description":"\u003cp\u003eIn this review the Nordic Pure 20x25x5 Lennox X6673_X6675 Replacement AC Filter is evaluated for homeowners and HVAC do-it-yourselfers who need reliable particle removal plus odor control. The bottom line: this two-pack of pleated plus carbon filters delivers consistent dust capture and improved indoor air quality without causing noticeable restriction in standard systems, and it is worth considering when you need a direct replacement for Lennox X6673 or X6675 units. Measure your existing filter and compare to the stated actual size before buying to ensure a correct fit.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eActual size clarity:\u003c\/strong\u003e The filter lists an actual size of 19.75 x 24.75 x 4.38 in so users can match their return box precisely and avoid fit issues caused by nominal sizing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDirect replacement:\u003c\/strong\u003e Made to replace Lennox X6673 and X6675 media filters, it fits systems expecting those part numbers without modification.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMERV 10 filtration:\u003c\/strong\u003e The MERV 10 rating (equivalent to MPR 1000) provides effective capture of dust and common airborne particles while maintaining reasonable airflow for most residential furnaces.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eActivated carbon layer:\u003c\/strong\u003e A fused carbon layer helps attract and hold odorous gases and VOCs, reducing household smells compared with standard pleated filters.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMade in USA:\u003c\/strong\u003e Manufactured in the United States, which can reassure buyers about materials and production standards.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThis filter is best for homeowners with systems that require a 20 x 25 x 5 nominal filter where the actual dimension of roughly 19.75 x 24.75 x 4.38 in will fit the return or media slot. It suits families and allergy sufferers looking for improved dust capture and modest odor control without upgrading to a much higher-resistance filter.\u003c\/p\u003e\n\u003cp\u003eIt is not ideal for systems that require exact factory nominal sizing without room for the actual dimensions listed, or for installations that demand higher than MERV 10 performance such as clinical environments. Also, buyers who need a thinner or deeper custom media should look elsewhere.\u003c\/p\u003e\n\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eGood particle capture with \u003cstrong\u003eMERV 10\u003c\/strong\u003e media that balances filtration and airflow.\u003c\/li\u003e\n\u003cli\u003eCarbon layer adds measurable reduction of odors and VOCs compared with plain pleated filters.\u003c\/li\u003e\n\u003cli\u003eCustomers report a snug, correct fit in compatible bottom return boxes and steady airflow without furnace strain.\u003c\/li\u003e\n\u003cli\u003eMade in the USA and sold as a convenient two-pack for periodic replacement.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eActual size differs from nominal size, so buyers must measure carefully to avoid a poor fit.\u003c\/li\u003e\n\u003cli\u003eSome customers note mixed impressions of build thickness, so long-term durability may vary by usage and system.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eNordic Pure\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNominal size\u003c\/td\u003e\n\u003ctd\u003e20 x 25 x 5 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eActual size\u003c\/td\u003e\n\u003ctd\u003e19.75 x 24.75 x 4.38 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eReplaces\u003c\/td\u003e\n\u003ctd\u003eLennox X6673, X6675\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter rating\u003c\/td\u003e\n\u003ctd\u003eMERV 10 (equivalent to MPR 1000)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial feature\u003c\/td\u003e\n\u003ctd\u003ePleated media fused with activated carbon\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePackage\u003c\/td\u003e\n\u003ctd\u003e2 pack\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe Nordic Pure 20x25x5 replacement filter is a practical, good-value choice for homeowners who need a direct Lennox X6673\/X6675 substitute with dust capture and mild odor control. Measure to confirm the actual dimensions will fit your system, and expect reliable filtration with minimal impact on airflow for typical residential furnaces.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eWill this filter fit my 20 x 25 slot?\u003c\/strong\u003e\u003cbr\u003eCheck the return or filter slot and compare to the listed actual size of 19.75 x 24.75 x 4.38 in; nominal 20 x 25 x 5 labels often differ from the true size.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow effective is the carbon layer?\u003c\/strong\u003e\u003cbr\u003eThe activated carbon layer helps reduce household odors and some VOCs while the MERV 10 media captures dust and common airborne particles.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs this safe for all furnaces?\u003c\/strong\u003e\u003cbr\u003eYes for most residential furnaces that accept MERV 10 media; however, always confirm the system tolerates a thicker media and monitor airflow after installation.\u003c\/p\u003e","brand":"Nordic Pure","offers":[{"title":"Default Title","offer_id":48185588023515,"sku":"B01N9NLVJ9","price":82.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/81qXDffx_vL._AC_SL1500.jpg?v=1769659722","url":"https:\/\/gearmusthave.com\/products\/nordic-pure-20x25x5-lennox-x6673-x6675-replacement-filter-merv-10","provider":"GearMustHave","version":"1.0","type":"link"}