18x20x1 Air Filters for Furnace & AC

People don’t realize that the indoor air they breathe is full of allergens and contaminants. Now you might be thinking that you keep your home clean, how could you have pollutants and allergens. The answer is increased use of synthetic materials and dirty air filters in your HVAC systems.

Having the right filter for your HVAC system is key to maximizing your heating or cooling efficiency and improves your indoor air quality. Merv Filters LLC stocks a large variety of air filters, choose the one that suits your needs. Shop by quality, higher the MERV rating, the more efficient the filter will be holding allergens.

Product Specifications

  • Nominal size: 18x20x1
  • Made in: USA
  • Actual Size: 17 1/2 x 19 1/2 x 3/4
  • Price: $29.60 – $93.60
  • Available in: 4, 6,12 Packs
  • Designed to last: 90 days
  • Pleats made of: Synthetic media
  • Frame made of: Beverage board
  • Delivery Time: Within 3-5 business days from the order date

Benefits of the Merv Filters LLC 18x20x1 Filter


However, 18x20x1 furnace filter has a lifespan of 90 days, but if you are living with any asthma or allergic patient, we recommend you to change the filter every 30-60 days to maintain a healthy environment.

Made In The USA

Merv Filters LLC manufactures all air filters in the USA. You can take advantage of special offers on bulk orders by purchasing directly from the manufactures.

Ultra High Quality

The synthetic filter media used in ac filter 18x20x1 does not absorb moisture and will not further support microbial growth. Our heavy-duty beverage board frames offer a moisture resistant, sturdy frame, ensuring to provide a healthy and comfortable environment.


Ideal for basic and standard residential and commercial use.

MERV 11:

Ideal for standard and superior residential and commercial use.

MERV 13:

Ideal for superior residential and commercial use and smoking lounges.

Note: The colour of ac filter 18x20x1 may vary from the actual product due to lighting effects and differences in your screens.

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