{"product_id":"nordic-pure-20x25x5-lennox-x6673-x6675-replacement-merv-14","title":"Nordic Pure 20x25x5 Lennox X6673 X6675 Replacement MERV 14","description":"\u003cp\u003eIn this review of the Nordic Pure 20x25x5 Lennox X6673_X6675 replacement filter, the bottom line is practical: it is for homeowners and HVAC techs who need a high-efficiency, odor-reducing media filter that fits the common 20 x 25 x 5 nominal slot but whose actual dimensions matter. The single biggest reason to buy is its combination of \u003cstrong\u003eMERV 14\u003c\/strong\u003e level particle capture and an activated charcoal panel for odor control, giving cleaner indoor air without noticeably choking the system when installed in compatible furnaces and returns.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eNominal and actual sizing:\u003c\/strong\u003e The filter is marketed as 20 x 25 x 5 but lists an actual size of 19 3\/4 x 24 3\/4 x 4 3\/8 so users can confirm fit before installing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh filtration efficiency:\u003c\/strong\u003e The MERV 14 rating captures fine particulates and is equivalent to MPR 2800 for improved indoor air quality.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCarbon odor control:\u003c\/strong\u003e A flat panel infused with activated charcoal helps reduce common household odors and volatile vapors.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia construction:\u003c\/strong\u003e Electrostatically charged synthetic pleats increase dust capture while maintaining acceptable airflow in compatible systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed as a replacement for Lennox X6673 and X6675 media filters, making it straightforward to swap into systems that accept those reference models.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMade in the USA:\u003c\/strong\u003e Manufactured domestically, which may matter to buyers prioritizing domestic production.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThis filter is best for homeowners, renters with 20 x 25 x 5 nominal filter slots, and HVAC professionals who need a high-performance replacement compatible with Lennox X6673 and X6675 media filters and who want both particle capture and odor reduction. It suits spaces where allergy reduction, dust control, and odor mitigation are priorities and where the heating or cooling system can accept a media filter of roughly 4 3\/8 in actual depth.\u003c\/p\u003e\n\n\u003cp\u003eCustomers who should look elsewhere include systems that require an exact 5 in thick filter or have tight clearances; because the product lists a different actual depth, measure the return or filter slot first. Also, those needing only basic dust control might prefer a lower-MERV, lower-cost thin panel filter if system airflow constraints are a concern.\u003c\/p\u003e\n\n\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eHigh particle capture with \u003cstrong\u003eMERV 14\u003c\/strong\u003e efficiency for improved indoor air quality.\u003c\/li\u003e\n\u003cli\u003eActivated charcoal panel provides tangible odor control in homes with cooking or pet smells.\u003c\/li\u003e\n\u003cli\u003eGood value and fit for customers replacing Lennox X6673_X6675 filters, with multiple customers noting improved dust capture and airflow behavior.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eActual dimensions differ from the nominal size, so measuring the filter slot is required before purchase and some buyers report mixed opinions on build size and fit.\u003c\/li\u003e\n\u003c\/ul\u003e\n\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 3\/4 x 24 3\/4 x 4 3\/8 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter Rating\u003c\/td\u003e\n\u003ctd\u003eMERV 14 (equivalent to MPR 2800)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eReplacement For\u003c\/td\u003e\n\u003ctd\u003eLennox X6673 and X6675\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMedia Features\u003c\/td\u003e\n\u003ctd\u003ePleated electrostatically charged synthetic with activated charcoal panel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eQuantity\u003c\/td\u003e\n\u003ctd\u003e4 pack\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe Nordic Pure 20x25x5 replacement is a sensible choice for those who need strong particulate filtration plus odor reduction in systems that accept a roughly 4 3\/8 in deep media filter. It delivers \u003cstrong\u003eMERV 14\u003c\/strong\u003e performance, a charcoal panel, and reliable dust capture at a reasonable value, but buyers must measure their filter slot to ensure the slightly smaller actual dimensions provide a proper fit.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eWill this filter fit my 20 x 25 x 5 slot?\u003c\/strong\u003e\u003cbr\u003eMeasure your filter slot and compare to the listed actual size of 19 3\/4 x 24 3\/4 x 4 3\/8 in to confirm fit before purchasing.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes the charcoal panel affect airflow?\u003c\/strong\u003e\u003cbr\u003eThe activated charcoal is a flat panel for odor control and the pleated electrostatic media is designed to maintain acceptable airflow for compatible systems, though measuring and system compatibility should be considered.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs this equivalent to MPR 2800?\u003c\/strong\u003e\u003cbr\u003eYes, the MERV 14 rating is stated to be equivalent to MPR 2800.\u003c\/p\u003e","brand":"Nordic Pure","offers":[{"title":"Default Title","offer_id":48252887498971,"sku":"B01MU6M828","price":269.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/81LGYbBijEL._AC_SL1500.jpg?v=1778311299","url":"https:\/\/gearmusthave.com\/products\/nordic-pure-20x25x5-lennox-x6673-x6675-replacement-merv-14","provider":"GearMustHave","version":"1.0","type":"link"}