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

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.

How do I know what size air filter I need?

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).

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.

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Can you run air without filter?

The short answer: You can get away with running your AC without a filter for a short amount of time without hurting your system. That being said, running your AC without a filter for longer than 6-8 hours can cause serious damage to your AC system and significantly lower the quality of the air in your home.

What are standard size air filters?

Standard air filter sizes include:

10X20 14 X 20 20X20
12X12 14X24 24 X 24
12X20 14X25 20X24
12X24 14X30 20X25
12X30 15X20 20X30

What happens if you use the wrong size air filter?

Using The Wrong Size Air Filter

Using the wrong size reduces the efficiency of your heating and cooling system. … This dirties up your furnace which could affect its performance or possibly harm the system’s internal components, leading to costly repairs or replacements.

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.

What size air filters do apartments use?

If you’re looking for a reliable quality air filter, and you have no special circumstances, then we recommend starting with the MERV 8, or even a MERV 11. However, if you have a newborn baby or allergies, then we recommend at least a MERV 11, or maybe a MERV 13, depending on your needs.

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.

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Are all air filters the same size?

Air Filter Sizes for Your Home Can Be Frustrating

Unfortunately, that’s not the case – there are about 20 “standard sizes” for air filters, and none have the same measurements. … Because incorrectly sized (and incorrectly installed) air filters cause air seepage and decrease filter effectiveness.

What happens if you run your central air without a filter?

Without a filter, the condensation drain will fail to drain the moisture from your AC unit. This will result in condensation accumulation on the Freon tubing. The condensation will then start dripping down the pan, causing water damage to the whole system.

Is no air filter better than a dirty one?

Running your air conditioner without a filter is worse than running it with a dirty one. Instead, get to the store as soon as possible for a replacement or call an HVAC professional for replacement. Without a filter, your air conditioner is at risk for severe and expensive problems.

Is it OK to run the furnace without a filter?

Technically, you can temporarily run a furnace without a filter. However, it’s important to emphasize the word “temporarily” here. … Poor air quality: For one, not having a filter in place means there is nothing to prevent dust and debris from being sucked into your furnace and recirculated throughout your home.

What is the most common size air filter?

Currently, the most common size furnace filters are 10×20. But should your system need custom sized air filters, note that we offer custom sizing ranging from 8 x 24 x 1 to 25 x 30 x 1.

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What size do HVAC air filters come in?

While there are no standard furnace filter sizes that will fit all models, the most common filter dimensions include: 10 X 20. 14 X 20. 16 X 24.

Are cabin and engine air filters the same size?

Replace It Yourself

Filters may look almost identical, but can differ by a fraction of an inch in length. This may not seem to make a big difference, but it could cause your filter to malfunction and allow unfiltered air to enter the car engine. There are two common vehicle air filters. They are panel and round.