Can I use a smaller air filter in my furnace?

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.

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.

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.

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Do Furnace filters have to be exact size?

Your filter or HVAC unit should have both the nominal and the actual size written on it. If you can’t find the actual size, it’s a good idea to measure it just in case. Our website categorizes filters by the nominal size, making it easier to navigate and find your filter.

Can I use a 2 inch filter instead of 1 inch?

As you can see the 2 inch filter will serve our needs MUCH better than the 1 inch filter. Even if the duct system is in good shape, using this filter will keep the system from struggling.

Can I use a larger furnace filter?

If your current furnace only allows for furnace filter sizes with a depth of one inch, HVAC contractors can modify the furnace to accommodate larger sizes. This does take work and time. However, homeowners get to use better furnace filter sizes that do more for home comfort. They also worry less about their furnaces.

Does size of air filter matter?

Does Size Matter? You’ve guessed it! The answer is yes. … If your filter is not the right size, either too small or too big, air will flow around the filter rather than through it, and as a result—not all of the air will get filtered.

Can you use an air filter thats too big?

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.

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What happens if you put the furnace filter in the wrong way?

When a furnace filter is placed backwards, the fibers can’t do their job properly. This means your furnace has to work harder to generate the same air flow, resulting in increased energy costs. Particles are also allowed to build up irregularly, making the furnace working even harder to draw air.

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 do I find my furnace filter size?

Follow these 3 easy steps:

  1. Follow these 3 easy steps:
  2. Step 1 – Measuring Length and Width (L x W). …
  3. Step 2 – Measure the thickness of your filter from front to back.
  4. Step 3 – Put Your Measurements Together (L x W x D).
  5. It’s as simple as that – You are now ready to buy the right filter for your AC or Furnace.

How tight should a furnace 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.

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).
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Can I use a 2 inch air filter?

The general best practice is to use the thickest air filter you can for maximum efficiency. … If your system only fits a 1-inch or 2-inch filter, a high MERV rating could be detrimental. A 1-inch filter with less surface space will get clogged fairly quickly and need to be replaced much sooner than a thicker filter.

Can I use 2 filters in my furnace?

Bottom Line: Putting two filters will not make it last longer but may make you have to replace it earlier, assuming it doesn’t already reduce air flow too much with just the filters.

Does width of furnace filter matter?

Before purchasing a replacement filter, check the specifications to make sure it is a good match for your system. Furnace filters can range anywhere from 1″to 5″ in thickness. In general, the thicker the furnace filter is the more efficiently your unit work and the longer it will last.