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Filtrete Dust Pollen Filter

Air Cleaning Filter Contains 1 Filter Lasts up to 3 Months 1000 Performance Rating Filtrete® Micro Allergen Reduction filters provide an easy way to help reduce airborne allergens in your home. They capture large airborne particles from the air that passes through them, including dust, pollen, and mold spores. They also trap microscopic allergens, such as pet dander, smoke, and smog. The difference is in the Microparticle Performance Rating (MPR) and Air Flow Balance. How We Measure Filtrete Filter Performance: Filtrete air cleaning filters are electrostatically charged to attract and capture particles from the air that passes through the filter. Each Filtrete filter has a Microparticle Performance Rating (MPR). This rating measures a filter's ability to capture particles between 0.3 and 1.0 microns. The higher the MPR, the more efficient the filter is at capturing these tiny particles. How Clean is Your Indoor Air and Water? Many people would be surprised ...

$12.59
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$12.59

Air Cleaning Filter Contains 1 Filter Lasts up to 3 Months 1000 Performance Rating Filtrete® Micro Allergen Reduction filters provide an easy way to help reduce airborne allergens in your home. They capture large airborne particles from the air that passes through them, including dust, pollen, and mold spores. They also trap microscopic allergens, such as pet dander, smoke, and smog. The difference is in the Microparticle Performance Rating (MPR) and Air Flow Balance. How We Measure Filtrete Filter Performance: Filtrete air cleaning filters are electrostatically charged to attract and capture particles from the air that passes through the filter. Each Filtrete filter has a Microparticle Performance Rating (MPR). This rating measures a filter's ability to capture particles between 0.3 and 1.0 microns. The higher the MPR, the more efficient the filter is at capturing these tiny particles. How Clean is Your Indoor Air and Water? Many people would be surprised ...

Air Cleaning Filter Contains 1 Filter Lasts up to 3 Months 1000 Performance Rating Filtrete® Micro Allergen Reduction filters provide an easy way to help reduce airborne allergens in your home. They capture large airborne particles from the air that passes through them, including dust, pollen, and mold spores. They also trap microscopic allergens, such as pet dander, smoke, and smog. The difference is in the Microparticle Performance Rating (MPR) and Air Flow Balance. How We Measure Filtrete Filter Performance: Filtrete air cleaning filters are electrostatically charged to attract and capture particles from the air that passes through the filter. Each Filtrete filter has a Microparticle Performance Rating (MPR). This rating measures a filter's ability to capture particles between 0.3 and 1.0 microns. The higher the MPR, the more efficient the filter is at capturing these tiny particles. How Clean is Your Indoor Air and Water? Many people would be surprised ...

$12.59
close
$12.59

Air Cleaning Filter Contains 1 Filter Lasts up to 3 Months 1000 Performance Rating Filtrete® Micro Allergen Reduction filters provide an easy way to help reduce airborne allergens in your home. They capture large airborne particles from the air that passes through them, including dust, pollen, and mold spores. They also trap microscopic allergens, such as pet dander, smoke, and smog. The difference is in the Microparticle Performance Rating (MPR) and Air Flow Balance. How We Measure Filtrete Filter Performance: Filtrete air cleaning filters are electrostatically charged to attract and capture particles from the air that passes through the filter. Each Filtrete filter has a Microparticle Performance Rating (MPR). This rating measures a filter's ability to capture particles between 0.3 and 1.0 microns. The higher the MPR, the more efficient the filter is at capturing these tiny particles. How Clean is Your Indoor Air and Water? Many people would be surprised ...

High Performance Filter   2200 MPR   Filtrete Elite Allergen Reduction filters provide an easy way to help reduce the airborne allergens in homes. The filter captures large airborne allergens like household dust, pollen and mold spores. It also manages to trap microscopic allergens, such as pet dander, smoke, smog, and particles that can carry bacteria, viruses and odors. The difference is in the Microparticle Performance Rating (MPR) and Air Flow Balance. How We Measure Filtrete Filter Performance: Filtrete air cleaning filters are electrostatically charged to attract and capture particles from the air that passes through the filter. Each Filtrete filter has a Microparticle Performance Rating (MPR). This rating measures a filter's ability to capture particles between 0.3 and 1.0 microns. The higher the MPR, the more efficient the filter is at capturing these tiny particles. How Clean is Your Indoor Air and Water? Many people would be surprised to ...

$20.69
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$20.69

High Performance Filter   2200 MPR   Filtrete Elite Allergen Reduction filters provide an easy way to help reduce the airborne allergens in homes. The filter captures large airborne allergens like household dust, pollen and mold spores. It also manages to trap microscopic allergens, such as pet dander, smoke, smog, and particles that can carry bacteria, viruses and odors. The difference is in the Microparticle Performance Rating (MPR) and Air Flow Balance. How We Measure Filtrete Filter Performance: Filtrete air cleaning filters are electrostatically charged to attract and capture particles from the air that passes through the filter. Each Filtrete filter has a Microparticle Performance Rating (MPR). This rating measures a filter's ability to capture particles between 0.3 and 1.0 microns. The higher the MPR, the more efficient the filter is at capturing these tiny particles. How Clean is Your Indoor Air and Water? Many people would be surprised to ...

High Performance Filter Contains 1 Filter Lasts up to 3 Months 2200 Performance Rating Filtrete® Elite Allergen Reduction filters provide an easy way to help reduce airborne allergens in your home. They capture large airborne particles from the air that passes through them, including dust, pollen, and mold spores. They also trap microscopic allergens, such as pet dander, smoke, smog, and particles that can carry bacteria, viruses and odors. The difference is in the Microparticle Performance Rating (MPR) and Air Flow Balance. How We Measure Filtrete Filter Performance: Filtrete air cleaning filters are electrostatically charged to attract and capture particles from the air that passes through the filter. Each Filtrete filter has a Microparticle Performance Rating (MPR). This rating measures a filter's ability to capture particles between 0.3 and 1.0 microns. The higher the MPR, the more efficient the filter is at capturing these tiny particles. How Clean is Your ...

$20.69
close
$20.69

High Performance Filter Contains 1 Filter Lasts up to 3 Months 2200 Performance Rating Filtrete® Elite Allergen Reduction filters provide an easy way to help reduce airborne allergens in your home. They capture large airborne particles from the air that passes through them, including dust, pollen, and mold spores. They also trap microscopic allergens, such as pet dander, smoke, smog, and particles that can carry bacteria, viruses and odors. The difference is in the Microparticle Performance Rating (MPR) and Air Flow Balance. How We Measure Filtrete Filter Performance: Filtrete air cleaning filters are electrostatically charged to attract and capture particles from the air that passes through the filter. Each Filtrete filter has a Microparticle Performance Rating (MPR). This rating measures a filter's ability to capture particles between 0.3 and 1.0 microns. The higher the MPR, the more efficient the filter is at capturing these tiny particles. How Clean is Your ...

High Performance Filter Contains 1 Filter Lasts up to 3 Months 1900 Performance Rating Filtrete® Ultimate Allergen Reduction filters provide an easy way to help reduce airborne allergens in your home. They capture large airborne particles from the air that passes through them, including dust, pollen, and mold spores. They also trap microscopic allergens, such as pet dander, smoke, smog, and particles that can carry bacteria, viruses and odors. The difference is in the Microparticle Performance Rating (MPR) and Air Flow Balance. How We Measure Filtrete Filter Performance: Filtrete air cleaning filters are electrostatically charged to attract and capture particles from the air that passes through the filter. Each Filtrete filter has a Microparticle Performance Rating (MPR). This rating measures a filter's ability to capture particles between 0.3 and 1.0 microns. The higher the MPR, the more efficient the filter is at capturing these tiny particles. How Clean is Your Indoor ...

$17.99
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$17.99

High Performance Filter Contains 1 Filter Lasts up to 3 Months 1900 Performance Rating Filtrete® Ultimate Allergen Reduction filters provide an easy way to help reduce airborne allergens in your home. They capture large airborne particles from the air that passes through them, including dust, pollen, and mold spores. They also trap microscopic allergens, such as pet dander, smoke, smog, and particles that can carry bacteria, viruses and odors. The difference is in the Microparticle Performance Rating (MPR) and Air Flow Balance. How We Measure Filtrete Filter Performance: Filtrete air cleaning filters are electrostatically charged to attract and capture particles from the air that passes through the filter. Each Filtrete filter has a Microparticle Performance Rating (MPR). This rating measures a filter's ability to capture particles between 0.3 and 1.0 microns. The higher the MPR, the more efficient the filter is at capturing these tiny particles. How Clean is Your Indoor ...

High Performance Filter Contains 1 Filter Lasts up to 3 Months 1900 Performance Rating Filtrete® Ultimate Allergen Reduction filters provide an easy way to help reduce airborne allergens in your home. They capture large airborne particles from the air that passes through them, including dust, pollen, and mold spores. They also trap microscopic allergens, such as pet dander, smoke, smog, and particles that can carry bacteria, viruses and odors. The difference is in the Microparticle Performance Rating (MPR) and Air Flow Balance. How We Measure Filtrete Filter Performance: Filtrete air cleaning filters are electrostatically charged to attract and capture particles from the air that passes through the filter. Each Filtrete filter has a Microparticle Performance Rating (MPR). This rating measures a filter's ability to capture particles between 0.3 and 1.0 microns. The higher the MPR, the more efficient the filter is at capturing these tiny particles. How Clean is Your Indoor ...

$17.99
close
$17.99

High Performance Filter Contains 1 Filter Lasts up to 3 Months 1900 Performance Rating Filtrete® Ultimate Allergen Reduction filters provide an easy way to help reduce airborne allergens in your home. They capture large airborne particles from the air that passes through them, including dust, pollen, and mold spores. They also trap microscopic allergens, such as pet dander, smoke, smog, and particles that can carry bacteria, viruses and odors. The difference is in the Microparticle Performance Rating (MPR) and Air Flow Balance. How We Measure Filtrete Filter Performance: Filtrete air cleaning filters are electrostatically charged to attract and capture particles from the air that passes through the filter. Each Filtrete filter has a Microparticle Performance Rating (MPR). This rating measures a filter's ability to capture particles between 0.3 and 1.0 microns. The higher the MPR, the more efficient the filter is at capturing these tiny particles. How Clean is Your Indoor ...

High Performance Filter Contains 1 Filter Lasts up to 3 Months 1900 Performance Rating Filtrete® Ultimate Allergen Reduction filters provide an easy way to help reduce airborne allergens in your home. They capture large airborne particles from the air that passes through them, including dust, pollen, and mold spores. They also trap microscopic allergens, such as pet dander, smoke, smog, and particles that can carry bacteria, viruses and odors. The difference is in the Microparticle Performance Rating (MPR) and Air Flow Balance. How We Measure Filtrete Filter Performance: Filtrete air cleaning filters are electrostatically charged to attract and capture particles from the air that passes through the filter. Each Filtrete filter has a Microparticle Performance Rating (MPR). This rating measures a filter's ability to capture particles between 0.3 and 1.0 microns. The higher the MPR, the more efficient the filter is at capturing these tiny particles. How Clean is Your Indoor ...

$17.99
close
$17.99

High Performance Filter Contains 1 Filter Lasts up to 3 Months 1900 Performance Rating Filtrete® Ultimate Allergen Reduction filters provide an easy way to help reduce airborne allergens in your home. They capture large airborne particles from the air that passes through them, including dust, pollen, and mold spores. They also trap microscopic allergens, such as pet dander, smoke, smog, and particles that can carry bacteria, viruses and odors. The difference is in the Microparticle Performance Rating (MPR) and Air Flow Balance. How We Measure Filtrete Filter Performance: Filtrete air cleaning filters are electrostatically charged to attract and capture particles from the air that passes through the filter. Each Filtrete filter has a Microparticle Performance Rating (MPR). This rating measures a filter's ability to capture particles between 0.3 and 1.0 microns. The higher the MPR, the more efficient the filter is at capturing these tiny particles. How Clean is Your Indoor ...

High Performance Filter   2200 MPR   Filtrete Elite Allergen Reduction filters provide an easy way to help reduce the airborne allergens in homes. The filter captures large airborne allergens like household dust, pollen and mold spores. It also manages to trap microscopic allergens, such as pet dander, smoke, smog, and particles that can carry bacteria, viruses and odors. The difference is in the Microparticle Performance Rating (MPR) and Air Flow Balance. How We Measure Filtrete Filter Performance: Filtrete air cleaning filters are electrostatically charged to attract and capture particles from the air that passes through the filter. Each Filtrete filter has a Microparticle Performance Rating (MPR). This rating measures a filter's ability to capture particles between 0.3 and 1.0 microns. The higher the MPR, the more efficient the filter is at capturing these tiny particles. How Clean is Your Indoor Air and Water? Many people would be surprised to ...

$20.69
close
$20.69

High Performance Filter   2200 MPR   Filtrete Elite Allergen Reduction filters provide an easy way to help reduce the airborne allergens in homes. The filter captures large airborne allergens like household dust, pollen and mold spores. It also manages to trap microscopic allergens, such as pet dander, smoke, smog, and particles that can carry bacteria, viruses and odors. The difference is in the Microparticle Performance Rating (MPR) and Air Flow Balance. How We Measure Filtrete Filter Performance: Filtrete air cleaning filters are electrostatically charged to attract and capture particles from the air that passes through the filter. Each Filtrete filter has a Microparticle Performance Rating (MPR). This rating measures a filter's ability to capture particles between 0.3 and 1.0 microns. The higher the MPR, the more efficient the filter is at capturing these tiny particles. How Clean is Your Indoor Air and Water? Many people would be surprised to ...

High Performance Filter Contains 1 Filter Lasts up to 3 Months 1900 Performance Rating Filtrete® Ultimate Allergen Reduction filters provide an easy way to help reduce airborne allergens in your home. They capture large airborne particles from the air that passes through them, including dust, pollen, and mold spores. They also trap microscopic allergens, such as pet dander, smoke, smog, and particles that can carry bacteria, viruses and odors. The difference is in the Microparticle Performance Rating (MPR) and Air Flow Balance. How We Measure Filtrete Filter Performance: Filtrete air cleaning filters are electrostatically charged to attract and capture particles from the air that passes through the filter. Each Filtrete filter has a Microparticle Performance Rating (MPR). This rating measures a filter's ability to capture particles between 0.3 and 1.0 microns. The higher the MPR, the more efficient the filter is at capturing these tiny particles. How Clean is Your Indoor ...

$17.99
close
$17.99

High Performance Filter Contains 1 Filter Lasts up to 3 Months 1900 Performance Rating Filtrete® Ultimate Allergen Reduction filters provide an easy way to help reduce airborne allergens in your home. They capture large airborne particles from the air that passes through them, including dust, pollen, and mold spores. They also trap microscopic allergens, such as pet dander, smoke, smog, and particles that can carry bacteria, viruses and odors. The difference is in the Microparticle Performance Rating (MPR) and Air Flow Balance. How We Measure Filtrete Filter Performance: Filtrete air cleaning filters are electrostatically charged to attract and capture particles from the air that passes through the filter. Each Filtrete filter has a Microparticle Performance Rating (MPR). This rating measures a filter's ability to capture particles between 0.3 and 1.0 microns. The higher the MPR, the more efficient the filter is at capturing these tiny particles. How Clean is Your Indoor ...

Air Cleaning Filter Contains 1 Filter Lasts up to 3 Months 1000 Performance Rating Filtrete® Micro Allergen Reduction filters provide an easy way to help reduce airborne allergens in your home. They capture large airborne particles from the air that passes through them, including dust, pollen, and mold spores. They also trap microscopic allergens, such as pet dander, smoke, and smog. The difference is in the Microparticle Performance Rating (MPR) and Air Flow Balance. How We Measure Filtrete Filter Performance: Filtrete air cleaning filters are electrostatically charged to attract and capture particles from the air that passes through the filter. Each Filtrete filter has a Microparticle Performance Rating (MPR). This rating measures a filter's ability to capture particles between 0.3 and 1.0 microns. The higher the MPR, the more efficient the filter is at capturing these tiny particles. How Clean is Your Indoor Air and Water? Many people would be surprised ...

$12.59
close
$12.59

Air Cleaning Filter Contains 1 Filter Lasts up to 3 Months 1000 Performance Rating Filtrete® Micro Allergen Reduction filters provide an easy way to help reduce airborne allergens in your home. They capture large airborne particles from the air that passes through them, including dust, pollen, and mold spores. They also trap microscopic allergens, such as pet dander, smoke, and smog. The difference is in the Microparticle Performance Rating (MPR) and Air Flow Balance. How We Measure Filtrete Filter Performance: Filtrete air cleaning filters are electrostatically charged to attract and capture particles from the air that passes through the filter. Each Filtrete filter has a Microparticle Performance Rating (MPR). This rating measures a filter's ability to capture particles between 0.3 and 1.0 microns. The higher the MPR, the more efficient the filter is at capturing these tiny particles. How Clean is Your Indoor Air and Water? Many people would be surprised ...

Air Cleaning Filter Contains 1 Filter Lasts up to 3 Months 1000 Performance Rating Filtrete® Micro Allergen Reduction filters provide an easy way to help reduce airborne allergens in your home. They capture large airborne particles from the air that passes through them, including dust, pollen, and mold spores. They also trap microscopic allergens, such as pet dander, smoke, and smog. The difference is in the Microparticle Performance Rating (MPR) and Air Flow Balance. How We Measure Filtrete Filter Performance: Filtrete air cleaning filters are electrostatically charged to attract and capture particles from the air that passes through the filter. Each Filtrete filter has a Microparticle Performance Rating (MPR). This rating measures a filter's ability to capture particles between 0.3 and 1.0 microns. The higher the MPR, the more efficient the filter is at capturing these tiny particles. How Clean is Your Indoor Air and Water? Many people would be surprised ...

$12.59
close
$12.59

Air Cleaning Filter Contains 1 Filter Lasts up to 3 Months 1000 Performance Rating Filtrete® Micro Allergen Reduction filters provide an easy way to help reduce airborne allergens in your home. They capture large airborne particles from the air that passes through them, including dust, pollen, and mold spores. They also trap microscopic allergens, such as pet dander, smoke, and smog. The difference is in the Microparticle Performance Rating (MPR) and Air Flow Balance. How We Measure Filtrete Filter Performance: Filtrete air cleaning filters are electrostatically charged to attract and capture particles from the air that passes through the filter. Each Filtrete filter has a Microparticle Performance Rating (MPR). This rating measures a filter's ability to capture particles between 0.3 and 1.0 microns. The higher the MPR, the more efficient the filter is at capturing these tiny particles. How Clean is Your Indoor Air and Water? Many people would be surprised ...

High Performance Filter Contains 1 Filter Lasts up to 3 Months 1900 Performance Rating Filtrete® Ultimate Allergen Reduction filters provide an easy way to help reduce airborne allergens in your home. They capture large airborne particles from the air that passes through them, including dust, pollen, and mold spores. They also trap microscopic allergens, such as pet dander, smoke, smog, and particles that can carry bacteria, viruses and odors. The difference is in the Microparticle Performance Rating (MPR) and Air Flow Balance. How We Measure Filtrete Filter Performance: Filtrete air cleaning filters are electrostatically charged to attract and capture particles from the air that passes through the filter. Each Filtrete filter has a Microparticle Performance Rating (MPR). This rating measures a filter's ability to capture particles between 0.3 and 1.0 microns. The higher the MPR, the more efficient the filter is at capturing these tiny particles. How Clean is Your Indoor ...

$17.99
close
$17.99

High Performance Filter Contains 1 Filter Lasts up to 3 Months 1900 Performance Rating Filtrete® Ultimate Allergen Reduction filters provide an easy way to help reduce airborne allergens in your home. They capture large airborne particles from the air that passes through them, including dust, pollen, and mold spores. They also trap microscopic allergens, such as pet dander, smoke, smog, and particles that can carry bacteria, viruses and odors. The difference is in the Microparticle Performance Rating (MPR) and Air Flow Balance. How We Measure Filtrete Filter Performance: Filtrete air cleaning filters are electrostatically charged to attract and capture particles from the air that passes through the filter. Each Filtrete filter has a Microparticle Performance Rating (MPR). This rating measures a filter's ability to capture particles between 0.3 and 1.0 microns. The higher the MPR, the more efficient the filter is at capturing these tiny particles. How Clean is Your Indoor ...

High Performance Filter Contains 1 Filter Lasts up to 3 Months 2200 Performance Rating Filtrete® Elite Allergen Reduction filters provide an easy way to help reduce airborne allergens in your home. They capture large airborne particles from the air that passes through them, including dust, pollen, and mold spores. They also trap microscopic allergens, such as pet dander, smoke, smog, and particles that can carry bacteria, viruses and odors. The difference is in the Microparticle Performance Rating (MPR) and Air Flow Balance. How We Measure Filtrete Filter Performance: Filtrete air cleaning filters are electrostatically charged to attract and capture particles from the air that passes through the filter. Each Filtrete filter has a Microparticle Performance Rating (MPR). This rating measures a filter's ability to capture particles between 0.3 and 1.0 microns. The higher the MPR, the more efficient the filter is at capturing these tiny particles. How Clean is Your ...

$20.69
close
$20.69

High Performance Filter Contains 1 Filter Lasts up to 3 Months 2200 Performance Rating Filtrete® Elite Allergen Reduction filters provide an easy way to help reduce airborne allergens in your home. They capture large airborne particles from the air that passes through them, including dust, pollen, and mold spores. They also trap microscopic allergens, such as pet dander, smoke, smog, and particles that can carry bacteria, viruses and odors. The difference is in the Microparticle Performance Rating (MPR) and Air Flow Balance. How We Measure Filtrete Filter Performance: Filtrete air cleaning filters are electrostatically charged to attract and capture particles from the air that passes through the filter. Each Filtrete filter has a Microparticle Performance Rating (MPR). This rating measures a filter's ability to capture particles between 0.3 and 1.0 microns. The higher the MPR, the more efficient the filter is at capturing these tiny particles. How Clean is Your ...

High Performance Filter Contains 1 Filter Lasts up to 3 Months 2200 Performance Rating Filtrete® Elite Allergen Reduction filters provide an easy way to help reduce airborne allergens in your home. They capture large airborne particles from the air that passes through them, including dust, pollen, and mold spores. They also trap microscopic allergens, such as pet dander, smoke, smog, and particles that can carry bacteria, viruses and odors. The difference is in the Microparticle Performance Rating (MPR) and Air Flow Balance. How We Measure Filtrete Filter Performance: Filtrete air cleaning filters are electrostatically charged to attract and capture particles from the air that passes through the filter. Each Filtrete filter has a Microparticle Performance Rating (MPR). This rating measures a filter's ability to capture particles between 0.3 and 1.0 microns. The higher the MPR, the more efficient the filter is at capturing these tiny particles. How Clean is Your ...

$20.69
close
$20.69

High Performance Filter Contains 1 Filter Lasts up to 3 Months 2200 Performance Rating Filtrete® Elite Allergen Reduction filters provide an easy way to help reduce airborne allergens in your home. They capture large airborne particles from the air that passes through them, including dust, pollen, and mold spores. They also trap microscopic allergens, such as pet dander, smoke, smog, and particles that can carry bacteria, viruses and odors. The difference is in the Microparticle Performance Rating (MPR) and Air Flow Balance. How We Measure Filtrete Filter Performance: Filtrete air cleaning filters are electrostatically charged to attract and capture particles from the air that passes through the filter. Each Filtrete filter has a Microparticle Performance Rating (MPR). This rating measures a filter's ability to capture particles between 0.3 and 1.0 microns. The higher the MPR, the more efficient the filter is at capturing these tiny particles. How Clean is Your ...

Air Cleaning Filter Contains 1 Filter Lasts up to 3 Months 1000 Performance Rating Filtrete® Micro Allergen Reduction filters provide an easy way to help reduce airborne allergens in your home. They capture large airborne particles from the air that passes through them, including dust, pollen, and mold spores. They also trap microscopic allergens, such as pet dander, smoke, and smog. The difference is in the Microparticle Performance Rating (MPR) and Air Flow Balance. How We Measure Filtrete Filter Performance: Filtrete air cleaning filters are electrostatically charged to attract and capture particles from the air that passes through the filter. Each Filtrete filter has a Microparticle Performance Rating (MPR). This rating measures a filter's ability to capture particles between 0.3 and 1.0 microns. The higher the MPR, the more efficient the filter is at capturing these tiny particles. How Clean is Your Indoor Air and Water? Many people would be surprised ...

$12.59
close
$12.59

Air Cleaning Filter Contains 1 Filter Lasts up to 3 Months 1000 Performance Rating Filtrete® Micro Allergen Reduction filters provide an easy way to help reduce airborne allergens in your home. They capture large airborne particles from the air that passes through them, including dust, pollen, and mold spores. They also trap microscopic allergens, such as pet dander, smoke, and smog. The difference is in the Microparticle Performance Rating (MPR) and Air Flow Balance. How We Measure Filtrete Filter Performance: Filtrete air cleaning filters are electrostatically charged to attract and capture particles from the air that passes through the filter. Each Filtrete filter has a Microparticle Performance Rating (MPR). This rating measures a filter's ability to capture particles between 0.3 and 1.0 microns. The higher the MPR, the more efficient the filter is at capturing these tiny particles. How Clean is Your Indoor Air and Water? Many people would be surprised ...