• No minimums, no surprises — we ship every order for free! We’ll get your filters out the door fast so you can enjoy clean air and water without paying extra.

  • Shop with confidence! If you're not completely satisfied with your purchase, you have up to one year to return it for a refund or exchange. We stand behind every filter we sell.

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  • Every order is carefully packed and shipped by our team in Indiana. Your purchase helps support American jobs and hardworking families right here in the Midwest. Our AIRx Furnace / AC Filters and ClearChoice Fridge Filters are made in the USA.

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  • No minimums, no surprises — we ship every order for free! We’ll get your filters out the door fast so you can enjoy clean air and water without paying extra.

  • Shop with confidence! If you're not completely satisfied with your purchase, you have up to one year to return it for a refund or exchange. We stand behind every filter we sell.

    Learn More

  • Every order is carefully packed and shipped by our team in Indiana. Your purchase helps support American jobs and hardworking families right here in the Midwest. Our AIRx Furnace / AC Filters and ClearChoice Fridge Filters are made in the USA.

Cart 0

We don't know what's in your water,
but we know there's nothing in your cart.

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20x20x1 AIRx High Flow Air Filter

AIRx 20x20x1-High-Flow | Our#: 194851

20x20x1 AIRx High Flow Air Filter
↻ 3 Months Filter

Discount applied automatically

Filter Description

Reduce common allergy symptoms

  • Improves Air Flow
  • 65% More Filter Media
  • Great for All Systems!
  • Can Reduce Energy Costs
  • Actual Dimensions: 19 ½" x 19 ½" x ¾"

Compatibility Guarantee

Order with confidence - we'll take care of the rest

Satisfaction Guarantee

Full refund or exchange within 365 days of purchase

No Hassle Returns

Free return shipping with no hassles

Is it time to change your Filter?

Generally, we recommend you replace your air filters every 90 days. Find out below if you should change your filters more often.

If someone in your home has asthma or allergies change your filter every

6 Weeks

to ensure indoor air quality is at its best.

If you have pets change your filter every

2 Months

to avoid shedding and odor buildup.

If you have young children change your filter every

2–3 Months

as having clean air is even more important with children in your home.

Frequently Purchased Together

Product Details

Is this the right air filter for you?

Having trouble with your AC or Furnace shutting down or struggling to keep up with heating or cooling needs?  Energy bills costing too much?  The New AIRx High Flow filter solves the problem with improved airflow of ordinary pleated filters.

Better airflow means your AC or Furnace doesn't have to work as hard and will heat or cool your home in less time and at a lower energy cost. 

With 65% more filter media, High Flow filter greatly improves air flow while reducing potentially harmful pollutants in your air.

  • Perfect for all HVAC systems, especially older or sensitive systems.
  • MERV 11 rating means the filter attracts household allergens like dust, pollen, mold spores, dander, smoke and smog.
  • Did we mention 65% more pleated media?!
  • Made with pride in the USA.
  • Fast Shipping and Free Returns.

Do you want to know about the technical specs?

Nominal Dimensions
20 x 20 x 1"
Actual Dimensions
19 ½ x 19 ½ x ¾"
Filter Media
Electrostatically charged 100% synthetic gradient media that does not support microbiological growth
Filter Support Grid
30 gauge galvanized expanded metal grid
Frame
Moisture resistant double-wall beverage board
Max Temperature
180F (82C) continuous service, peak 225F (107C)
Max Humidity
Resistant to 100% R.H.
Initial Resistance
0.14" WC
Rated Velocity
295 FPM

Performance Rating

MERV (µm) PSE (%) 0.3-1.0 1.0-3.0 3.0-10 Airflow Rate (CFM) 410 615 819 1024 819 * * Max Rated Airflow
11 28 68 86 Initial Resistance (IWC) 0.09 0.14 0.2 0.28 0.2 *
MERV
11
(µm) PSE (%)
0.3-1.0 28
1.0-3.0 68
3.0-10 86
Airflow Rate (CFM) Initial Resistance (IWC)
410 0.09
615 0.14
819 0.2
1024 0.28
819 * 0.2 *
* Max Rated Airflow


How to change your furnace/air-conditioner/HVAC air filter

Estimated time: 10 minutes or less

Steps

  1. Determine the location of your filter

    Your forced air system will be similar, whether or not it is a heating (furnace) or cooling (AC) system – or both. The furnace filter housing/slot is located right next to the heating/cooling system’s air handler or blower. Your filter(s) may also be located in a return grille on the wall or ceiling of your home.

  2. Determine the type/size of filter that you use

    Typically, the dimensions or part number of the filter will be printed on the filter frame. Use this information to order a new filter.

  3. Purchase a new air filter from DiscountFilters.com

    Visit DiscountFilters.com and purchase a new filter. Use our filter finders to verify the correct match.

  4. Remove the old filter

    Turn off the power to the heating/cooling system and remove the old filter from its housing/slot and discard.

  5. Insert the new filter

    Pay attention to any airflow direction arrows printed on the frame of the new filter. Install the filter by sliding it into the filter housing/slot with the airflow arrow pointing towards the blower. If installing the filter in a wall or ceiling grille – the airflow arrow should point towards the wall or ceiling. Turn on the power to the forced air system.

    Enjoy cleaner air!