All filters are made in the USA + Free Shipping on orders over $50

Call Us C877.570.9755

18x30x1 Air Filter Merv 8
18x30x1 AC Filter Merv 11
18x30x1 Furnace Filter Merv 13
18x30x1 Filter Merv 13 Titanium
18x30x1 Filter Merv 10 Carbon
18x30x1 Filter Merv 8 Carbon 18x30x1 Filter Merv 8 Carbon
Protects All Against
  • Pollen protection
  • Dust protection
  • Mold protection
  • Dust Mites protection
    Dust Mites
  • Bacteria protection
  • Pet Dander protection
    Pet Dander
  • Smoke protection
  • Viruses protection
  • Cooking Smoke protection
  • Odor protection
  • Smog protection
{{ filter_count }} Pack of

18x30x1 Air Filter

AC Furnace Air Filter 18x30x1 -Inches

1. Select Filter Quality

Odor Eliminator

2. Select Quantity

${{ money(priceWithoutDiscount()) }} Save ${{ money(savePrice()) }} ({{ savePercent()}}%)


Product Description

Item Model Number: FKFB18X30
Brand: Filter King
Filter size: 18x30x1
Actual Size: 17.5 x 29.5 x .75
1-Inch Filter
MERV 8 Filter Rating
Protection From: Pollen, Dust, Mold, Dust Mites, Bacteria, Pet Dander, Smoke, Viruses
Residential / Commercial Use

Manufactured in the US

Why Buy Air Filters From Filter King?


In comparison to fiberglass filters, 18x30x1 pleated air filters are at least 20 times more effective. All Filter King air filters are made in the US.


Filters frames are made out of heat resistant paperboard with horizontal grid supports. Able to withstand temperatures of up to 200° F and resistant to moisture, the paperboard frames do not support microbial growth and outperforms traditional cardboard frames.


Chemical free, electrostatically charged synthetic polyester media is pleated, maximizing the surface area, to capture a high number of airborne particles as small as 0.3 microns with low air flow resistance. To increase durability, the media is supported with a corrosion resistant steel wire.

18x30x1 Air Filter Reviews

What MERV Rating should I choose?

How Often to Change Your 18x30x1 Air Filter?

Filter King AC & furnace filters aren’t the typical fiberglass filters that need to be replaced every 30 days. Our filters can typically be used for 3 to 5 months before requiring to be changed. Naturally, a variety of things influence filter lifespan.

Some of the factors that influence your filter’s life include outdoor air quality, whether pets are in the home, and how well your HVAC system is maintained.

Your air filter becomes clogged over time by trapped particles, preventing airflow. The efficiency of the HVAC filter declines. Your system must work harder to heat and cool your home. The extra strain on the HVAC system causes higher energy bills. Regular home air filter replacements can prevent expensive system repairs or replacements down the road.

You should change your filter more frequently if you notice:

  • Household dust build-up
  • The air isn’t cooling as is used to
  • There’s more dust near the air vents
  • A dirty filter surface
  • Higher energy bills
  • Burning smells near your HVAC system.

18x30x1 Air Filter

The average household will have its air systems pumping in proper air flow at a constant rate as long as it is able. Your Filter King 18x30x1 air filters trap unwanted air particles that pass by on airflow. There is no end to the potential irritants and particles that are capable of entering your home through its air systems. Your pleated air filters prevent the particles from entering, in turn, keep your home smelling fresh and clean. However, the air conditioner and furnace filters will become dirty themselves in the process and cause your home all sorts of problems.

Air Filter Use for Residential Homes

Your home needs air filters in its HVAC system or the air passing through it will not be as clean as you want it to be. Incoming air flow is able to contain any number of pollutants or allergens from the surrounding area. Without air filters, these airborne irritants begin to affect your home’s indoor air quality. The air inside your home will become uncomfortable and unhealthy to breathe without filtration, air filters keep incoming air flow from lowering your home’s air quality. Your air filters will become dirty over time and begin to cause issues throughout your air systems.

When the air filters in your home are dirty, then the resulting lack of airflow will begin to slowly start affecting your home. Airflow needs to cycle, or else the old air begins to stagnate and dry out which is both uncomfortable and unhealthy to breathe in. The home’s air quality will lower over time and your home will see its airborne issues increase over time. New air filters help prevent airflow issues in your home and keep them fresh, clean airflow coming in.

Air Filter Use for Apartments

When it comes to your apartment, more limited space in general means that you need to make every breath count. The air filters in your home’s HVAC system will keep the irritants coming from the outside of your home from coming in, and stop particles inside your home from spreading. The airflow traveling room to room is able to carry all sorts of irritants that begin to build up over time. Air filters are necessary to filter the lingering particles out of the air, but they need regular replacement to avoid any complications from developing.

When the air filters in your apartment become dirty then the limited air available may see a significant dip in quality. The cleaner airflow becomes blocked off, meaning that any lingering particles in the air settle on any open surfaces that they can. Issues with airborne particles are more prominent with a dirty filter, with resident pets or smokers, the resulting particles need to cycle out of a room before any residents can breathe them in.

18x30x1 Furnace Filter

Our air filters are usable for appropriately size furnace systems to help cleanse incoming heated airflow. Your HVAC system needs your air filter placed in between where the air heats up and where the blower fan will distribute it throughout your ducts. The warmed air will heat up your home to match your thermostat, but the heating and cooling system needs filtration in order to avoid bringing in any irritants. Over time, the air filters will become dirty as they would in other air systems, but furnaces have the additional problems that come with distributing heated air.

Heated airflow needs to be able to leave a furnace or it may cause a buildup in heat that the HVAC system cannot handle. When the temperatures become too extreme you may be facing costly repairs or even total system failure. The home will show signs of growing air filter problems when the temperatures between rooms begin to fluctuate over time. A new air conditioner filter is less expensive than HVAC repairs, so replacement should take place regularly.

Air Filter Changing Practices

Your home air filters need to be swapped out at a regular rate in order to prevent growing issues from affecting the air systems. Dirty filters affect indoor air quality, HVAC system integrity, and even cause a spike in billing over time. When the airflow in your home becomes blocked then the air systems will try to push past the problem by increasing its electrical usage. Your home will see a rise in its energy billing over time, which may cost you up to thousands of dollars a year.

The air filters in your home need regular maintenance at a rate usually mandated by the home’s environment and the air filters MERV (Minimum Efficiency Reporting Value) rating. The environment of your home may have all sorts of allergens and irritants that quickly clog up your filter’s mesh weaving. Our air filter MERV ratings determine just how efficient it is at blocking out particles like household dust, mold spores, dust mites, etc. Filter King 18x30x1 air filters rank as an eight on the MERV scale and are able to block out irritants like:

  • Pollen
  • Household Dust
  • Mold Spores
  • Dust Mites
  • Bacteria
  • Pet Dander
  • Smoke
  • Viruses

Replacing an Old Filter

The old air filters in your home will need replacement on a regular schedule, luckily the process only takes a few steps and a small bit of your time. You will need to order a replacement filter of a similar size to replace the old filter. The old filter's size is on its cardboard edge, from there a new filter comes in and should fit into the HVAC system neatly.

Air Filter Delivery

Filter King 18x30x1 air filters are manufactured with quality in mind and sold at affordable prices. We ship orders of two or more filters for free, orders see higher discounts for bulk purchases, and your air filters are usable upon delivery. We even offer an air filter subscription service where new filters are brought as often as monthly to match your filtration needs. The sooner you order your new 18x30x1 air filters the faster you can ensure the indoor air quality of your home remains clean and fresh.