Frequent question: Do you have to get the exact size air filter?

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.

Does an air filter have to fit perfectly?

The air filter is your shield against air pollutants. When it is incorrectly sized, various air contaminants may enter your vents at least resistance. … Your air filter should neither be small or big for your system. It should be the perfect fit to prevent the possibilities of indoor air illnesses.

What happens if you use the wrong size air filter?

When you use the wrong size air filter, or you install it incorrectly, the filter can’t effectively prevent dust from accumulating on the system’s motors and blowers. You’ll end up with a dirty furnace that can’t properly perform, and all of that debris could end up harming the system’s internal components.

How do I know what size air filter to buy?

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 air filters one size fits all?

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. … Even worse, incorrectly sized air filters can place undue stress on your HVAC system, damaging it and increasing your energy bills.

Is it OK to use a smaller air filter?

An improperly sized air filter doesn’t do its job. When it’s too small, it lets dust, mold, and other contaminants into your air vents. These then spew into your air, providing air quality problems.

Can I use a slightly smaller air filter?

For most systems you can use a standard sized filter within 5/8-in smaller than the air filter housing. If you are not able to find a standard sized filter within that parameter, you will need to order a custom sized air filter.

Can I use a bigger air filter?

Yes a larger air filter is better, a weird fact is furnaces have gotten smaller for a given amount of heat but the airflow required in house has not changed.

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.

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