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20x25x4 Air Filter

Nominal Size
Actual Size
Merv Rating

Bulk Quantity Pricing

4 6 12 48 72 120
Quantity

19.5x24.5x4

MERV 8

$12.93 $11.64 $11.38 $10.99 $9.70 $9.05

19.5x24.5x4

MERV 11

$20.12 $18.11 $17.71 $17.10 $15.09 $14.08

19.5x24.5x4

MERV 13

$25.16 $22.64 $22.14 $21.39 $18.87 $17.61

The 20x25x4 air filter is an important part of keeping the air in your home clean and your HVAC system running smoothly. It traps harmful particles like dust, pollen, pet hair, and other debris, which can improve the air quality inside your home. By using this filter, you also protect your HVAC unit from getting clogged or damaged by these particles. This filter, available from Custom Filters Direct, is a great choice for furnaces, central air systems, air conditioners, and other systems that require an air filter. With its thick design, the 20x25x4 air filter can handle both small and large particles, providing excellent protection for your home and your HVAC system.

  • Compatibility: The 20x25x4 air filter is designed to work with HVAC systems that have thicker filter slots, making it a good fit for many different types of units.
  • Filtration Capacity: Thanks to its high MERV rating, this air filter can catch more particles, keeping the air cleaner and your system running efficiently.
  • Changing Frequency: It’s recommended to change this air filter every 3 to 6 months, depending on how often you use your system and the air quality in your home.

Features Of The 20x25x4 Air Filter

  • Dimensions: While the air filter is labeled as 20x25x4, its actual size is 19.5x24.5x4. This slight difference ensures the filter fits properly in your system, without being too tight or too loose. Be sure to check the exact size of your HVAC filter slot to ensure a good fit.
  • Availability: The 20x25x4 air filter is easy to find online or in stores that sell HVAC supplies, making it convenient when you need a replacement. You won’t have to worry about finding a new filter when it’s time to change the old one.
  • MERV Ratings: The 20x25x4 air filter comes in three MERV rating options: 8, 11, and 13. The higher the rating, the better the filter is at catching smaller particles. While MERV 8 is good for everyday use, MERV 11 and 13 provide stronger filtration and are great for homes with pets or people with allergies, as well as commercial spaces.

Benefits Of The 20x25x4 Air Filter

  • Removes Allergens: One of the best things about the 20x25x4 air filter is how well it removes allergens from the air. This includes dust, pet dander, and pollen, all of which can make allergies worse. By using this air filter, you can make the air inside your home much healthier, especially for those with allergies.
  • Improves HVAC Efficiency: This air filter helps your HVAC system work better by keeping dirt and dust from clogging it. When your system isn’t filled with debris, it can run more smoothly, which means it uses less energy and lasts longer.
  • Protects HVAC System: Besides improving efficiency, the 20x25x4 air filter also protects the internal parts of your HVAC system. If contaminants get inside, they can cause damage or wear, which could lead to expensive repairs. This filter helps prevent that by stopping harmful particles before they enter the system.

Key Points To Consider

Here are a few things to keep in mind when choosing a 20x25x4 air filter for your home:

  • MERV And MPR Ratings: When buying a filter, check the MERV rating (between 8 and 13 is ideal) and MPR rating (between 600 and 2200) to ensure it’s good at trapping small particles. If you have pets or live in a dusty area, a higher rating will give you better filtration.
  • Lifespan: The filter should be changed every 1 to 3 months, depending on how much dust or pet hair is in your home and how often you run your HVAC system. Regular filter changes keep your system running well and improve air quality.
  • Budget: While it may be tempting to buy a cheaper filter, it’s usually better to invest in a high-quality one like the 20x25x4 air filter. Cheaper filters might not last as long or work as well, so you could end up spending more in the long run.

Maintaining The 20x25x4 Air Filter


Taking care of your 20x25x4 air filter is key to keeping your HVAC system working properly. Make sure to change the filter regularly to avoid dirt buildup, which can reduce airflow and strain your system. A clean filter allows your HVAC system to run more smoothly, providing better temperature control and cleaner air inside your home.

Precautions

To get the best results from your 20x25x4 air filter, here are some things to check:

  • Size: Be sure the filter you choose fits your system correctly. A filter that doesn’t fit properly will let air (and dust) bypass the filter, reducing its effectiveness. Measure your system’s filter slot and compare it to the actual size of the filter to ensure a good fit.
  • Deals: Keep an eye out for discounts or special offers when buying air filters. Buying them in bulk or during sales can save you money and make sure you always have a replacement on hand.
  • HVAC System Type: Not all filters work with every HVAC system, so check that the 20x25x4 air filter is compatible with your specific unit before purchasing. Using the wrong filter could reduce performance or even cause problems like mold growth inside the system.

Improve Indoor Air Quality With The 20x25x4 Air Filter By Custom Filters Direct

Investing in a high-quality 20x25x4 air filter is an easy way to improve the air inside your home and help your HVAC system run more efficiently. By regularly replacing the filter and choosing one with a high MERV rating, you can reduce allergens and harmful particles in the air, creating a healthier living environment. Custom Filters Direct offers reliable filters that provide long-lasting performance, making it a smart choice for anyone looking to improve their indoor air quality and extend the life of their HVAC system.