Are air filters one size fits all?

For example: 16x20x1, 20x20x1, 16x25x1, 20x20x1 are all standard sized air filters. Every unit has a specific sized filter which allows the it to perform correctly and efficiently. Most AC and HVAC units use standard sized filters, but some do require a custom size air filter to be purchased and installed.

Are all air filters the same size?

Unfortunately, that’s not the case – there are about 20 “standard sizes” for air filters, and none have the same measurements. … Even worse, incorrectly sized air filters can place undue stress on your HVAC system, damaging it and increasing your energy bills.

Do air filters have to be exact size?

Since air filters are most often sold by their nominal dimensions, it is crucial to learn how to properly measure your air filter. When making your purchase, you should order your filter by its nominal size, rather than its actual size.

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How do I know my air filter size?

Actual Size: The actual size of an air filter is typically written in the fine print on the frame of the filter and is usually 0.25″-0.5″ smaller than the advertised, nominal size. The actual size is what you’d find if you used a ruler to measure the exact dimensions of the filter.

Are air filters all the same?

The short answer is, no, they’re not all the same. In fact, there are many different types of air filters available and choosing the right one can make a real difference in the lifespan of your HVAC system. … You see, the higher the MERV rating, the more the filter restricts air flow.

What is the most common size air filter?

What Are the Most Common Air Filter Sizes

  • 20 x 25 x 1.
  • 20 x 25 x 4.
  • 16 x 20 x 1.
  • 16 x 25 x 4.
  • 20 x 30 x 1.
  • 12 x 12 x 1.
  • 14 x 14 x 1.
  • 14 x 20 x 1.

What air filter size means?

Air Filter Sizes: Length and width

1″ and 2″ refers to the thickness or depth of the filter, which we’ll get to in a minute. First, let’s talk about length and width. Length and width are technically interchangeable, but for discussion purposes, a 12×20 is 12 inches long and 20 inches wide.

Can you cut down air filters to fit?

Answering the Question: Is it okay to cut an air filter to fit? … Simply put, yes, you can cut an air filter if you know what you are doing, and if the filters you use will not become too weak from the cutting.

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How do I know what size filter to buy for my furnace?

Almost always, furnace filter sizes are printed on the side of the filter. They are read as Length x Width x Depth. When inspecting furnace filters, homeowners may find two different sets of sizes. First, there is the nominal size expressed in whole numbers.

Can I use a 1 inch filter instead of 4?

Question: Can i use a 1 inch filter instead of 4 inches? Answer: If you are okay with more frequent replacement and little stress on the system, 1” filter can be budget-friendly alternative of 4” filters.

How tight should an air filter fit?

How tight should a Furnace Filter fit? When you remove the existing filter, take note of the dimensions printed on its frame. Your new filter will need to match this size for the system to run efficiently. It should fit snugly but not so tight that you can’t easily slide the filter in and out.

What if my air filter is too big?

Air Filter Problems with Poor Fit

If you purchase a filter that’s too large, it won’t slide into the slot correctly. If the filter is too small, it won’t cover the entire space and may allow dust and dirt to flow past.

How do I know what size air filter I need without a filter?

Follow these 3 easy steps to measure your HVAC filter size:

  1. Step 1 – Measuring Length and Width (L x W). (If your filter is not a square, the smallest measurement goes first).
  2. Step 2 – Measure the thickness (Depth) of your filter from front to back.
  3. Step 3 – Put Your measurements together (L x W x D).
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Are all air filters compatible?

No, HVAC air filters differ in quality and dimensions, and some have features that others don’t. In most instances we advise using the filter your HVAC manufacturer recommends pairing with your system. All filters are assigned MERV ratings, which go from 1–20.

How do I know what air filter to buy?

Simply, you need the filter size that fits in your air return. You can typically find that size on the side of the air filter that you already have in use. This size will be the nominal size, which means it is rounded from its actual size.