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18 x 20 x 1 Air and Furnace Filters
Do your allergies act up, regardless of what season it is? Have you changed your air filter lately? That may be the solution. Our replacement 18x20x1 air filters allow you to find the best price and best efficiency filter for your home.
We often forget about our air or furnace filters, as they are tucked away in our closet or basement, and rarely get any attention. But if they are properly maintained and changed at regular intervals, they can make a huge different in both your home and in your health. At US Home Filter, we provide a variety of 18x20x1 size air filters, all with high MERV, or Minimum Efficiency Reporting Value, ratings. Buying a set of these filters, you will ensure that you have them on hand to change a few times a year and keep your home air at its cleanest.
As an added bonus, order today and receive Free Shipping on all air filter orders!
NOTE: Several brand replacements may be listed below. All filters on this page are compatible with each other. Each brand replacement is listed separately to provide you with corresponding part/model numbers for that specific filter.
Click on the + under "Details" below to see complete details about the filter.
Click here to view the Filter Comparison Chart
Enter a Quantity and click the "Buy" button.
| Details | Brand / Actual Size | MERV | Price / Filter | # Filters | Price / Case | Cases |
 | Baking Soda |
| | A MERV 8 Baking Soda Pleated Filter is recommended for mild odors and will protect your equipment and capture:
- Settling/Average Dust Particles
- Mold Spores
- Dust Mite Debris
- Pet Dander
- Pollen
Take a look at the features below to see if a Baking Soda Air Filter is a good choice for you!
Sodium Bicarbonate-Infused media to help neutralize common household odors Captures large amounts of dust along with common allergensIdeal for those who want to freshen the air and deodorize mild odorsAlso suitable for those with mild allergies
Made with heavy-duty materials to provide a sturdy filter Not available in custom sizes
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| 17‑1/2" x 19‑1/2" x 3/4" | MERV 8 - Baking Soda | $8.49 | 3 | $25.47 | |
| Details | Brand / Actual Size | MERV | Price / Filter | # Filters | Price / Case | Cases |
| Activated Carbon |
| | A MERV 8 Activated Carbon filter is recommended for severe odors and will protect your equipment and capture:
- Settling/Average Dust Particles
- Mold Spores
- Dust Mite Debris
- Pet Dander
- Pollen
- Tobacco Smoke
* Best recommended filter specifically for the removal of smoke odor from tobacco or fire and other severe and objectionable odors from fumes, gases, and chemicals
Effectively removes severe odors from tobacco smoke, pets, chemicals, gases, and other strong household odors
Captures large amounts of dust and common allergens
Ideal for those who need to control serious odors
Also suitable for those with mild allergies
Made with heavy-duty materials to provide a sturdy filter
Filter fragrances are not recommended as carbon absorbs fragrances
Not available in custom sizes
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| 17‑1/2" x 19‑1/2" x 3/4" | MERV 8 - Carbon | $11.00 | 6 | $66.00 | |
| Details | Brand / Actual Size | MERV | Price / Filter | # Filters | Price / Case | Cases |
| Flanders Poly |
| | A MERV 5 rating will protect your equipment and capture:
- Lint & Heavy Dust Particles
PrecisionAire and Flanders Furnace Filters
We all know we need to change our AC filters regularly to keep our units running optimally and keep the air in our homes clean during the warm months, but do you remember to change the furnace filter once it gets cold? Keeping your furnace in good working order saves money and energy!
A furnace filter has two main jobs:
- To keep airborne particles and dust out of the motor and internal components
- To help improve the air quality in your home by trapping dust, allergens and other indoor pollutants
We have a variety of sizes which are listed below and the following are characteristics and information about our furnace filters:
- Rated MERV 5 in 1"
- Rated MERV 6 in 2"
- Metal retainers on both sides for strength
- Polyester air filter fabric - no fiberglass
- Not available in custom sizes
- Made by Flanders PrecisionAire
Furnace filters satisfy the original purpose of having an air filter; a furnace filter will protect your HVAC equipment from getting dirty. While a furnace filter will keep your HVAC equipment clean which is a very important job, it will do little to improve indoor air quaility which has become a big issue with the number of indoor air pollutants present today. Pleated air filters will remove suspended particles that cannot be seen such a pollens, thus helping allergy sufferers. Carbon pleated air filters absorb irratating odors from the air. Baking soda pleated air filters freshen the air with proven sodium bicarbonate technology.
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| 17‑5/8 x 19‑5/8 x 3/4 | MERV 5 | $3.21 | 12 | $38.52 | |
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