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Filtrete? Ultra Allergen Reduction Deep Pleat Filter, 20 in x 25 in x 5 in (50.8 cm x 63.5 cm x 12.7 cm) | Meijer
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dailySTEM (Chris Woods) on X: "I used Chemistry to clean our furnace humidifier filter… I soaked it in vinegar (CH3COOH) to remove the deposits (Ca) & rust (Fe2O3) https://t.co/VaxJN9z7Ny" / X
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