How to Measure Your Filter
Steps 1 & 2
Measuring Length and Width (L x W). (If your filter is not a square, the smallest measurement goes first).
Step 3
Measure the thickness (Depth) of your filter from front to back.
Step 4
Put Your measurements together (L x W x D).
Actual Size
A filter’s true dimensions.
Example: 19.75” x 19.75” x 1”
Nominal Size
Rounded numbers used by manufacturers.
Example 20” x 20” x 1”
View Detailed Instructions
About 21 1/2 x 23 5/16 x 1 Carrier Replacement Air Filter
Actual Size:
21 1/2" x 23 5/16" x 3/4"
Product:
P80S.0121H23E-6
MERV 8
Fights:
Dust & Pollen
These 21.5x23.3125x1 air filters are right-sized for your needs. Choose the MERV rating that suits your lifestyle and breathe cleaner air.
Air Filter Type:
Pleated
FPR Rating:
FPR 5
Quality:
Dust & Pollen
Captured Particle Size:
3-10 Microns
Material:
Pleated
Capacity:
Standard Capacity
MERV Rating:
MERV 8
SKU:
P80S.0121H23E-6
MPR Rating:
MPR 600
GTIN/UPC:
192212066483
Lead Time:
2 Business Day
MERV 8, MPR 600, FPR 5
Fights lint, dust mites, mold spores, pollen, pet dander, and dust.
Every 60-90 DaysQualifies for Free Shipping
Fights lint, dust mites, mold spores, pollen, pet dander, and dust.
Every 60-90 DaysQualifies for Free Shipping
Replaces Bryant/Carrier part # KFAFK0412XXL
Fits HVAC Unit Models:
Bryant/Carrier/Payne: FV4, FK4, FC4, FB4, FA4, FH4, FA4CNC060, FC4BNB054000AEAA, FC4CNB054, FE4ANB006, FK4DNB006, FV4BNB006, FX44B, FX4CNF060
Pleated MERV 8 Media
Comparable to MPR 600 and FPR 5
Designed for Superior Filtration Efficiency
Made with electrostatically charged synthetic material that draws and captures allergens between 3 - 10 microns, including lint, dust mites, mold spores, pollen, pet dander, and dust.
Improve Indoor Air Quality
Protect your family and loved ones with clean indoor air quality at home. Aerostar filters are a simple and cost effective step towards a healthier home environment, free of airborne allergens and particles that can trigger various allergy and asthma symptoms.
Improve Efficiency and Reduce Cost
An Aerostar furnace air filter helps keep your HVAC unit working efficiently by removing dirt and reducing strain on the motor. When your unit runs properly, it consumes less energy, requires less maintenance and will have a longer life. These factors will have an impact on your utility bill and maintenance costs. It is recommended that you change the filter every 60 to 90 days during normal times of year but increase frequency to 30 days during peak summer and winter months when your unit is working the hardest.
About Aerostar Furnace Air Filters
Aerostar filters are manufactured in the USA by Filtration Group, a world-leading manufacturer and supplier of filtration solutions for residential, commercial and industrial applications. The Aerostar brand is known for constantly innovating and improving their technology to help make filtration more efficient, effective and environmentally friendly every day.
About MERV, MPR and FPR Rating
The three rating systems were created by different organizations. MERV is the domestic and international Industry Standard rating system established by the American Society of Heating, Refrigerating, and Air Conditioning Engineers. The other two rating systems were created by 3M and The Home Depot, but all are rating the same filter.
MERV Rating (Minimum Efficiency Reporting Value): As you have already learned, the MERV Rating is the primary rating system used in the industry, both domestically and internationally. Established by the American Society of Heating, Refrigerating, and Air Conditioning Engineers, MERV rates a filter’s ability to capture and hold particles and pollutants.
MPR (Micro-Particle Performance Rating): MPR Rating is a rating system developed by 3M. It rates the manufacturer’s Filtrete product line and their ability to capture airborne particles smaller than 1 micron.
FPR (Filter Performance Rating): FPR Rating is a rating system developed by The Home Depot for brands sold through their stores, including Honeywell. It utilizes a color code and number scale (4 to 10) that closely resembles the MERV rating.
What is a MERV Rating?
MERV ratings let you know the efficiency and level of filtration that an air filter can handle under normal circumstances. The higher the MERV rating, the finer the particles are that are filtered our of the air in your home. Many air filter retailers use MERV or a similar rating to rate their air filters.
About MERV, MPR and FPR Rating
MERV Rating (Minimum Efficiency Reporting Value):
MERV Rating is the primary rating system used in the industry, both domestically and internationally. Established by the American Society of Heating, Refrigerating, and Air Conditioning Engineers, MERV rates a filter’s ability to capture and hold particles and pollutants.
MPR (Micro-Particle Performance Rating):
MPR Rating is a rating system developed by 3M. It rates the manufacturer’s Filtrete product line and their ability to capture airborne particles smaller than 1 micron.
FPR (Filter Performance Rating):
FPR Rating is a rating system developed by The Home Depot for brands sold through their stores, including Honeywell. It utilizes a color code and number scale (4 to 10) that closely resembles the MERV rating.
FAQs
Designed to provide your home with high-performance filtration, a 21 1/2 x 23 5/16 x 1 air filter features pleated construction to stop dust, lint, pet dander, and pollen from circulating in your airspace. Its durable design makes it reliable when you need to protect your HVAC system, ensure long-lasting performance, and create more breathable, cleaner air in your environment.
If you want to ensure your HVAC system runs smoothly and keep your energy costs manageable, replace your 21 1/2 x 23 5/16 x 1 air filter every 60 to 90 days. It might need to be switched out more often if your home has pet hair, cigarette smoke, or someone in your household has allergies. Dirty air filters can cause your HVAC unit to struggle and will hinder air flow, increase your energy costs, lead to expensive repair bills, or make your system fail altogether. Ignoring filter changes can increase the number of pollutants, and poor filtration can negatively affect your indoor air quality. Change your air filter regularly to avoid these problems.
Determine the amount of filtration you need for your environment and the capacity of your HVAC system to select the appropriate MERV rating for the 21 1/2 x 23 5/16 x 1 filter you want to purchase. In spaces where dust and allergen control is necessary, a MERV 8 filter can effectively capture larger particles. If you need more filtration than a MERV 8 filter provides, a filter with a MERV 11 rating catches mold spores, allergens, and pet dander while ensuring proper airflow. When you need a high level of air purification, a MERV 13 filter traps finer microscopic airborne contaminants like bacteria, smoke, and some viruses. Confirm your HVAC system is able to support the added density of the MERV filter you’re considering to make sure it's compatible with your system.
Some 21 1/2 x 23 5/16 x 1 filters can be washed and reused, but others are disposable and need periodic replacement when they accumulate dirt, clog up, or reach the end of their lifespan. Compared to washable alternatives, disposable filter types provide better filtration and cleaner indoor air because they have higher MERV ratings. When you’re considering a reusable filter for your HVAC system, review your HVAC system manual to ensure it can accommodate the type of filter you want..
When you use a 21 1/2 x 23 5/16 x 1 filter, its pleated design and thicker depth allow it to trap finer particles that a thinner filter may miss. When it fits properly without causing gaps, it can reduce the risk of leaks and make sure harmful particles are removed, don’t bypass the filtration process, while providing consistent circulation. Because it's thicker, it holds more dirt and debris, is less likely to clog, and needs replacement less often, lowering maintenance costs and saving money.