ClariSelectAir filters, purifiers and indoor air gear, sized to your home

Filters · Purifiers · Humidity

The right filter for your exact size, and the purifier for your room.

Pick the size printed on your old filter and the grade you want. Every line that stocks that size shows up with a link to that exact listing. Purifiers are compared on rated room size, smoke CADR and noise.

Furnace filters by size Compare air purifiers
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Filter FinderHVAC and furnace filters
Filtration

18 filter lines in our catalog

    Compare every filter side by side

    Browse the catalog

    Every category, every model

    Each category lists every model we cover side by side, with the specifications that decide the purchase.

    Filterbuy Pet & Allergy Defense MERV 11 Air FilterHVAC and furnace filtersPleated furnace and AC filters by MERV, MPR and depth, with an exact listing for every size.113modelsLevoit Core 400S-P Smart Air PurifierAir purifiersRoom purifiers by rated room size, smoke CADR, noise and filter cost.175modelsCoway Airmega Mighty AP-1512HH & 200M Filter SetAir purifier replacement filtersMaker-original purifier filters matched to the units they fit.196modelsAprilaire 413 MERV 13 Replacement Air FilterWhole-house air cleaners and media filtersWhole-house media filters for Aprilaire, Honeywell and Lennox cabinets.30modelsLevoit OasisMist 1000S Smart Ultrasonic Cool Mist Tower HumidifierRoom humidifiersEvaporative, ultrasonic and warm-mist humidifiers by tank, run time and room size.112modelsAprilaire 35 Water Panel Humidifier FilterHumidifier filters and water panelsWater panels and wicks matched to the humidifiers they fit.76modelsMidea Cube 20 DehumidifierDehumidifiersPortable, crawl space and whole-house dehumidifiers by pints per day and rated area.100modelsAprilaire 600 Whole-House HumidifierWhole-house humidifiersBypass, fan-powered and steam humidifiers that mount on the furnace.22modelsAranet4 Indoor Air Quality MonitorAir quality monitorsCO2, radon and humidity monitors by what they measure.55models
    Sunlit living room with a sofa, side table and tall window

    Most filter problems are a size or grade mismatch: a frame that leaves a gap, or a grade the blower can't push through. Start with the numbers on your old filter.

    Guides

    Understand it first

    Guide4-Inch vs. 1-Inch Furnace Filters: Is a Media Cabinet Worth Upgrading?GuideActivated Carbon Filters: How Long Do They Actually Adsorb Odors?GuideActivated Carbon Pellet Weight: Why 100g Scrim Fails vs. 2-lb BedsGuideAir Changes Per Hour (ACH): How to Calculate Room Exchange RequirementsAir purifiersAir Purifier Noise Levels: What the Decibel Numbers MeanGuideAir Purifier Ozone Emissions: Understanding CARB Compliance vs. IonizersLibraryAll guides

    Lists & head-to-heads

    Rules stated, rank shown

    Best-ofBest 10x20x1 Air FiltersBest-ofBest 12x12x1 Air FiltersBest-ofBest 12x24x1 Air FiltersBest-ofBest 12x30x1 Air FiltersBest-ofBest 12x36x1 Air FiltersBest-ofBest 14x14x1 Air FiltersComparisonAerostar MERV 8 vs Aerostar MERV 11 (10x20x1)ComparisonAerostar MERV 8 vs Aerostar MERV 11 (12x24x1)ComparisonAprilaire 413 vs Aprilaire 213ComparisonAprilaire 413 vs Honeywell FC100A1037

    How ClariSelect works

    A reference, not a review blog

    Exact size, exact listing

    Every filter line lists its sizes, and each size links to its own listing, so you never land on the wrong size.

    Makers' own figures

    MERV, MPR, room ratings, CADR and noise come from the maker's page or the listing itself. If a maker doesn't state something, we say so.

    No paid placement

    Rankings follow the rule printed on each list. Commissions never decide what we cover or where it ranks.