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 InstructionsAbout 24x30x1 Air Filter
The Aerostar 24x30x1 pleated air filter delivers clean air by replacing your air system’s vent intake filter. Designed to work with most home and office AC and furnace systems with compatible intake vent sizes, filtering out dust, pollen, bacteria, and other airborne particles. Great indoor air quality is as easy as changing your air filter to Aerostar.
Fights lint, dust mites, mold spores, pollen, pet dander, and dust.
Every 60-90 DaysQualifies for Free Shipping
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 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 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 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
A 24x30x1 air filter is important because it supports better respiratory health and prevents dust from gathering in and damaging your HVAC system. It reduces the chance of airborne particles and harmful allergens from recirculating in your home or business while improving energy efficiency and saving money.
Depending on your household conditions and how dirty your filters get, you’ll need to replace the air filter in your home every 1 to 3 months. Homes with a lot of pet dander or dust should replace their air filter frequently to ensure their air stays clean and breathable.
The MERV ratings 12x24x1 air filters have include:
- 24x30x1 air filter MERV 8:Â Provides basic filtration, capturing lint and dust mites.Â
- 24x30x1 MERV 11 pleated air filter​: Best for allergy sufferers, traps fine debris like allergens.
- 24x30x1 air filter MERV 13​: Captures microparticles like smoke, pollen, bacteria, and odors.
When you learn about MERV vs. MPR vs. FPR rating systems, it will help you select the right filter. Developed by the American Society of Heating, Refrigerating, and Air-Conditioning Engineers, MERV ratings assess how efficient each MERV-rated filter is. FPR simplifies filter selection with a scale that's simple to use, while MPR focuses on how to capture smaller particles like allergens and fine dust particles.
When you use a 24x30x1 pleated air filter​, it's effective at catching allergens that trigger attacks. Filters with a high MERV rating will capture dust particles, pollen, mold spores, smoke, as well as pet dander. If you regularly replace your filter when it's dirty or discolored and thoroughly clean your home, you’ll have fewer allergy symptoms and your air will be healthier.Â
Washable 24x30x1 filters may last longer than disposable filters, but be aware that they provide less filtration, too. Make your choice based on the type of air quality you need.
Remove and dispose of a dirty air filter by sealing it in a plastic bag and placing it in the trash. Shut off the power to your HVAC system, and put in the new 24x30x1 filter, making sure the arrow is aligned in the same direction as the airflow. Ensure it fits snugly and turn your system on again. Check that it's operating properly.
Carbon-enhanced 24x30x1 air filters reduce lingering odors and smoke, neutralizing volatile organic compounds and chemicals in the air, preventing them from recirculating. They effectively create better air quality in your home’s airspace.Â
Using an air filter that isn’t the right size will force your HVAC system to work much harder and be less efficient. Gaps around the filter may let dust and debris bypass the filter, raising energy costs and disrupting proper airflow. The effects may be possible mechanical problems, a shorter lifespan for your HVAC system, and higher energy costs. It makes more sense to use the right size and change it regularly,Â