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Nominal size 18 x 20 x 2, actual size 17 1/2 x 19 1/2 x 1 3/4 (17.5 x 19.5 x 1.75) Attracts allergens, dust, pollen and other contaminants in the air. Hypoallergenic and antimicrobial pleated electrostatic filter material Nordic Pure It is recommended to change 2\; Product description Nordic Pure MERV 13 pleated AC furnace air filters provide exceptional filtration for residential and commercial environments. Every time air passes through a Nordic Pure pleated oven air filter, lint, dust, pollen, bacteria, pet dander, dust mites, mould spores, smoke particles, virus carriers, coughs and sneezes, smog, allergens and other impurities are removed. MERV 13 oven filters are comparable to HVAC filters rated MPR 2200-2400 or FPR 10. While different companies use different scales to measure the efficiency of the air filter, Nordic Pure chose the industry standard MERV as developed by ASHRAE (the American Society of Heating, Refrigeration and Air Conditioner Engineers). Regardless of the designation of the rating, the efficiency of all air filters is evaluated according to the same criteria as determined by Ashrae. Nordic Pure oven air conditioner filters are manufactured with a durable, moisture-resistant beverage board frame. As with all Nordic Pure furnace air conditioning filters, the material is electrostatically charged to attract unwanted particles. The media used does not promote the growth of bacteria or mould on the air filter and trap particles in the air better than glass fibre filters. Our attention to the smallest details leads to a healthier living space. For fresh, clean air in your home and office, it is important to change your AC filter regularly, especially with DIY enthusiasts. We recommend changing your HVAC stove filter every 1-3 months depending on your unique home or office environment. People with pets or allergy sufferers should change their air conditioner air filters more often. Replacing your air filter regularly not only improves indoor air quality, but also helps your HVAC unit work more efficiently. IMPORTANT NOTE Almost all air conditioner filters have a different actual size (the exact measurements) than the nominal size (the name) printed on the air conditioner filter. It is best to measure the exact size of your air conditioner filter and compare it to our actual size to ensure your HVAC replacement filter fits; Product description Nordic Pure MERV 13 pleated AC furnace air filters provide exceptional filtration for residential and commercial environments. Every time air passes through a Nordic Pure pleated oven air filter, lint, dust, pollen, bacteria, pet dander, dust mites, mould spores, smoke particles, virus carriers, coughs and sneezes, smog, allergens and other impurities are removed. MERV 13 oven filters are comparable to HVAC filters rated MPR 2200-2400 or FPR 10. While different companies use different scales to measure the efficiency of the air filter, Nordic Pure chose the industry standard MERV as developed by ASHRAE (the American Society of Heating, Refrigeration and Air Conditioner Engineers). Regardless of the designation of the rating, the efficiency of all air filters is evaluated according to the same criteria as determined by Ashrae. Nordic Pure oven air conditioner filters are manufactured with a durable, moisture-resistant beverage board frame. As with all Nordic Pure furnace air conditioning filters, the material is electrostatically charged to attract unwanted particles. The media used does not promote the growth of bacteria or mould on the air filter and trap particles in the air better than glass fibre filters. Our attention to the smallest details leads to a healthier living space. For fresh, clean air in your home and office, it is important to change your AC filter regularly, especially with DIY enthusiasts. We recommend changing your HVAC stove filter every 1-3 months depending on your unique home or office environment. People with pets or allergy sufferers should change their air conditioner air filters more often. Replacing your air filter regularly not only improves indoor air quality, but also helps your HVAC unit work more efficiently. IMPORTANT NOTE Almost all air conditioner filters have a different actual size (the exact measurements) than the nominal size (the name) printed on the air conditioner filter. It is best to measure the exact size of your air conditioner filter and compare it to our actual size to ensure your HVAC replacement filter fits; Nordic Pure MERV 13 pleated AC furnace air filters provide exceptional filtration for residential and commercial environments. Every time air passes through a Nordic Pure pleated oven air filter, lint, dust, pollen, bacteria, pet dander, dust mites, mould spores, smoke particles, virus carriers, coughs and sneezes, smog, allergens and other impurities are removed. MERV 13 oven filters are comparable to HVAC filters rated MPR 2200-2400 or FPR 10. While different companies use different scales to measure the efficiency of the air filter, Nordic Pure chose the industry standard MERV as developed by ASHRAE (the American Society of Heating, Refrigeration and Air Conditioner Engineers). Regardless of the designation of the rating, the efficiency of all air filters is evaluated according to the same criteria as determined by Ashrae. Nordic Pure oven air conditioner filters are manufactured with a durable, moisture-resistant beverage board frame. As with all Nordic Pure furnace air conditioning filters, the material is electrostatically charged to attract unwanted particles. The media used does not promote the growth of bacteria or mould on the air filter and trap particles in the air better than glass fibre filters. Our attention to the smallest details leads to a healthier living space. For fresh, clean air in your home and office, it is important to change your AC filter regularly, especially with DIY enthusiasts. We recommend changing your HVAC stove filter every 1-3 months depending on your unique home or office environment. People with pets or allergy sufferers should change their air conditioner air filters more often. Replacing your air filter regularly not only improves indoor air quality, but also helps your HVAC unit work more efficiently. IMPORTANT NOTE Almost all air conditioner filters have a different actual size (the exact measurements) than the nominal size (the name) printed on the air conditioner filter. It is best to measure the exact size of your air conditioner filter and compare it to our actual size to ensure your HVAC replacement filter fits