What Is MPR In Air Filters?

13.03.2025

Akshay Sadiora

Air filters play a vital role in keeping the air in your home clean and safe to breathe. They help remove dust, pollen, pet dander, and other airborne particles that can cause allergies and respiratory issues. Clean air is important for everyone, but it is especially important for children, older adults, and people with asthma or other breathing problems. Poor indoor air quality can lead to health issues such as coughing, sneezing, headaches, and even serious conditions like lung infections. This is why choosing the right air filter is an important step in protecting your home and family from harmful pollutants.

When selecting an air filter, it is essential to understand what MPR is and how it affects filtration. The MPR meaning refers to the Microparticle Performance Rating, a system developed to measure how well a filter captures tiny particles. Filters with higher MPR ratings are more effective at trapping fine particles, helping to improve air quality. However, it is important to choose an MPR level that balances strong filtration with good airflow. Using an overly dense filter can increase the workload on your HVAC system, leading to higher energy costs and reduced efficiency.

In this blog, you will learn all the information about MPR air filters, such as what MPR is in an air filter and how MPR filter ratings function. You will also gain knowledge about the difference between MPR vs. MERV vs. FPR, the importance of MPR for indoor air quality, and how to select the perfect MPR-rated air filter for your home. In addition, we will also debunk some of the most common misconceptions about the MPR rating.

MPR (Microparticle Performance Rating) is a system created to measure how well an air filter captures tiny airborne particles. It specifically focuses on particles between 0.3 and 1 micron, such as pollen, pet dander, smoke, and bacteria. The MPR rating scale ranges from 300 to 2800, with higher numbers indicating better filtration. Filters with a higher MPR can trap more microscopic pollutants, helping to improve indoor air quality and reduce allergens in your home. This makes MPR an important factor when choosing an air filter, especially for people with allergies or respiratory issues.

Unlike other filter rating systems, MPR mainly targets smaller particles. MERV (Minimum Efficiency Reporting Value) is a widely used industry standard, but it measures filtration based on a broader range of particle sizes, including larger ones. FPR (Filter Performance Rating) is a system used by Home Depot to rank filters sold in their stores. Understanding these differences can help you select the right filter for your home’s needs.

Understanding How MPR Ratings Function

The MPR rating scale ranges from 300 to 2800, indicating the effectiveness of air filters in capturing small particles. A lower rating, such as 300, means the filter is efficient at trapping larger particles like dust and pollen. As the rating increases, filters begin capturing smaller particles, such as smoke, bacteria, and even some viruses. For example, MPR 1000 filters trap a broader range of particles, while MPR 1900+ filters are designed to capture even more microscopic pollutants. The higher the MPR rating, the better the filter’s ability to remove fine particles from the air.

Filters with higher MPR ratings are essential for improving indoor air quality, especially in environments where people are sensitive to allergens, dust, pollen, and pet dander. These filters are effective in homes with smokers or pets, as they capture smoke and pet-related allergens. The MPR filter rating system provides a simple way to select an air filter that can enhance your home's air quality by trapping harmful microparticles effectively.

MPR Vs. MERV Vs. FPR: Key Differences

There are three major air filter rating systems: MERV, MPR, and FPR. MERV is the most widely used and rates filters based on their ability to trap different particle sizes. MPR focuses on capturing smaller particles like dust and smoke. FPR, a system from Home Depot, simplifies filter selection with a color-coded scale. Below is a detailed table comparing these ratings.

Feature	MERV (Minimum Efficiency Reporting Value)	MPR (Microparticle Performance Rating)	FPR (Filter Performance Rating)
What It Measures	Rates a filter’s ability to trap particles of all sizes, from dust to bacteria.	Focuses on how well a filter captures microscopic particles like pollen and smoke.	Uses a simplified rating system to show filtration levels.
Rating Scale	1 to 16 (higher numbers capture smaller particles).	300 to 2800 (higher numbers trap finer particles).	4 to 10 (higher numbers indicate better filtration).
Who Uses It	Standard across all filter brands and industries.	Used exclusively by 3M Filtrete filters.	Used by Home Depot for store-branded filters.
Best For	Homes, offices, hospitals, and industries need different levels of air filtration.	Homes where indoor air quality is most important.	Quick selection for residential use.
Focus	Captures a broad range of particles, including allergens, dust, and mold.	Specializes in microparticle filtration, especially useful for allergies.	Provides an easy way to compare filters without technical details.
Ease of Comparison	Universally recognized, making it easy to compare filters across brands.	Only applies to 3M air filters, limiting direct comparisons.	Simple but not as precise as MERV.
Color Coding	No color coding.	No color coding.	Uses colors: Blue (basic), Red (better), Purple (best).
Examples	MERV 8 (basic), MERV 11 (better), and MERV 13 (best for allergies).	MPR 600 (basic), MPR 1000 (better), and MPR 1900+ (best for fine particles).	FPR 4 (basic), FPR 7 (better), FPR 10 (best filtration).

This table helps you compare air filter ratings so you can choose the right one for your needs.

Importance Of MPR For Indoor Air Quality

MPR (Microparticle Performance Rating) plays a major role in improving indoor air quality by measuring how well air filters capture tiny airborne particles. Since indoor air often contains dust, pollen, smoke, and other pollutants, using the right filter can help reduce these contaminants and create a healthier environment. MPR ratings help people choose filters that best fit their needs, whether it is for homes, offices, or places where allergies are a concern.

MPR is especially helpful for those looking to remove microscopic pollutants like PM 2.5, pet dander, and exhaust fumes. A higher MPR rating means better filtration of smaller particles, leading to cleaner air and fewer allergy triggers. While MPR is mainly used in residential settings, MERV is more common in commercial and industrial applications, and FPR is mostly used for retail filters. Below is a comparison table that highlights the key differences between MPR, MERV, and FPR to help in making an informed decision.

Selecting The Perfect MPR Rating For Your Home

Choosing the right MPR (Microparticle Performance Rating) for your home helps improve indoor air quality and keeps your HVAC system running efficiently. A higher MPR means the filter can capture smaller particles, such as pet dander, smoke, and bacteria, making the air cleaner to breathe. However, filters with very high MPR ratings can restrict airflow if your HVAC system is not designed for them. It is important to balance filtration needs with system efficiency to avoid overworking your unit, which could increase energy costs.

For homes with allergy sufferers or pets, a filter with an MPR of 1000 or higher is recommended to trap fine particles like dust mites and pet hair. If you are concerned about airborne pollutants such as smoke, smog, or bacteria, an MPR 1500+ filter will provide better protection. Those in areas with poor air quality should consider high-MPR filters to reduce exposure to harmful particles while ensuring the HVAC system remains efficient.

Truth Behind MPR Rating Misconceptions

Many people have misunderstandings about MPR ratings, leading to confusion when selecting an air filter. Some believe that higher MPR ratings are always better, while others assume that MERV and MPR are the same. In reality, the right filter depends on your home’s air quality needs and your HVAC system’s capacity. Below is a table that clears up common misconceptions and provides the facts.

Common MPR Rating Misconceptions vs. Facts:

Misconception	Fact
Higher MPR is always better.	A high-MPR filter captures smaller particles, but it may restrict airflow and strain the HVAC system. The best choice depends on your air quality needs and system compatibility.
MERV and MPR are the same.	MERV (Minimum Efficiency Reporting Value) is a universal rating used for both residential and commercial air filters, while MPR (Microparticle Performance Rating) is specific to Filtrete filters. They measure different aspects of filtration.
All high-MPR filters remove viruses.	While high-MPR filters can capture smaller particles, not all are designed to eliminate airborne viruses. Some specialized HEPA filters provide better protection.
A high-MPR filter lasts longer.	A filter’s lifespan depends on air quality, usage, and maintenance, not just its MPR rating. Even high-MPR filters need regular replacement to stay effective.
You do not need to change a filter often if it has a high MPR.	Clogged filters reduce airflow and efficiency. No matter the MPR, regular replacement (every 1-3 months) is necessary for best performance.

By understanding these facts, you can choose the right air filter for your home without falling for common myths.

Conclusion

Understanding MPR ratings in air filters is essential for maintaining clean indoor air and protecting your health. Here, you have learned what MPR is, how it compares to MERV and FPR, and how to select the right filter for your home. We also debunked common misconceptions, helping you make an informed decision. Choosing the correct MPR rating ensures effective filtration without overloading your HVAC system. Before purchasing a new air filter, always check your HVAC manual to ensure compatibility. A well-chosen filter improves air quality and keeps your system running efficiently.

Breathe cleaner, healthier air with Custom Filters Direct! Our premium air filters are designed to trap dust, pollen, pet dander, and other airborne particles, ensuring your HVAC system runs efficiently while improving your indoor air quality. Whether you need high-performance filtration or a balance between airflow and protection, we have the perfect filter for your space. Shop with confidence and experience the difference in every breath. Need assistance? Connect with us for more information at info@customfiltersdirect.com or call 877-958-5612. We are here to help you find the best air filter for your home or business!

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Frequently Asked Questions

How Often Should I Replace An Air Filter Based On Its MPR Rating?

You should replace your air filter based on its MPR rating and how often you use your HVAC system. A standard 1-inch Filtrete MPR 1550 or 1900 filter needs to be changed every 90 days to keep your indoor air clean and your system running smoothly. If you have pets or allergies or live in a dusty area, you may need to replace it more frequently. Thicker pleated filters last longer, sometimes up to 12 months. If your filter looks dusty or your HVAC system is working harder than usual, it is time for a change. Checking the manufacturer’s instructions and using apps like the Filtrete Smart App can help you track when to replace your filter for the best air quality.

Can I Use A High MPR Filter In Any HVAC System?

Not all HVAC systems can handle a high MPR filter because thicker filters can block airflow, making the system work harder. This can lead to higher energy use, reduced efficiency, or even damage over time. If you have allergies or breathing problems, a high MPR filter can help trap smaller particles, but it is important to check if your system is designed for it. A filter that is too strong may strain the unit instead of improving air quality. Always check your system’s manual or ask an HVAC professional before switching to a high MPR filter. Also, make sure the filter size is correct to keep airflow steady and your system running smoothly.

Do MPR-Rated Filters Help Reduce Household Odors?

Yes, MPR-rated filters can help reduce household odors, especially those with an activated carbon layer. This layer traps odor-causing particles and volatile organic compounds (VOCs), improving indoor air freshness. Filters with an MPR of 1200 or higher are better at capturing pet dander, smoke, and smog, which contribute to bad smells. Higher MPR filters, like Filtrete MPR 1500 or 2200, also capture bacteria and viruses while reducing odors. However, for strong or lingering smells, an air purifier with an activated carbon filter may work better. Replacing filters on time is also important because a clogged filter cannot trap odors effectively, making the air feel stale. Always check the filter packaging for odor control features before buying.

Are MPR-Rated Filters Effective Against Viruses And Bacteria?

Yes, MPR-rated filters with a rating of 1500 or higher are effective at capturing bacteria and viruses. These filters are designed to trap tiny particles as small as 0.3 microns, which include allergens, smoke, and airborne germs. MPR 1900 to 2800 filters offer the highest protection, reducing the spread of harmful particles in your home. Choosing a higher MPR filter is a good option if you want better air quality, especially during flu season or if someone in your home has respiratory issues. However, regular filter changes are necessary to keep your HVAC system running efficiently. For even better protection, using an air purifier with HEPA filters alongside your HVAC filter can further improve air cleanliness.

How Does MPR Relate To Energy Efficiency In HVAC Systems?

MPR-rated filters can affect energy efficiency in HVAC systems, but the impact depends on airflow and filter resistance. Filters with a higher MPR capture smaller particles, improving indoor air quality and preventing dust buildup in the system. This can help your HVAC unit run smoothly and reduce maintenance needs. However, high-efficiency filters can also restrict airflow, making the system work harder and use more energy. The key is to choose a filter that balances good filtration with proper airflow. Other factors like duct sealing, insulation, and system age also play a role in energy savings. Regular filter changes keep the system efficient, preventing clogs that can increase energy costs over time.

Can I Wash And Reuse An Air Filter With An MPR Rating?

No, you should not wash and reuse an air filter with an MPR rating because these filters are made for one-time use. Washing them can damage the material and make them less effective at trapping dust and allergens. If you need a reusable option, look for washable filters like foam, metal mesh, or electrostatic filters. These can be cleaned with water and mild soap and then dried before reuse. However, even washable filters wear out over time and should be replaced when they no longer work well. To keep your HVAC system running smoothly, always follow the manufacturer’s replacement guidelines for your filter type.

Do All Air Filter Brands Use The MPR Rating System?

No, not all air filter brands use the MPR rating system because it is only used by 3M for its Filtrete filters. Other brands use different rating systems to measure filter performance. The most common one is MERV (Minimum Efficiency Reporting Value), which is an industry-standard system that measures how well a filter captures particles. Another system is FPR (Filter Performance Rating), which is used by Home Depot for the filters sold in their stores. While these systems have similar purposes, they use different methods to rate filters. When choosing a filter, check the rating system it uses to make sure it meets your needs for air quality and HVAC system efficiency.

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What Is MPR In Air Filters