Frequent question: Can I use a smaller 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.

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.

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 different size furnace filter?

Most HVAC systems can only fit 1”-thick filters. If yours can accommodate a bigger one, opt for the thickest filter that comfortably fits and has been recommended by your HVAC professional. Thicker filters can handle more buildup, so you don’t have to replace them as often.

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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 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.

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.

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.

Can you use 1 inch filters instead 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.

Can I use a 4 inch filter instead of 1?

The 4-inch thick air filter has a definite advantage over the 1” filter in terms of longevity, airflow and maximum filtering potential. Thus, if it fits your furnace, then a 4-inch air filter is better than a 1-inch air filter in regards to improving air quality.

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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.

Is a 5 inch furnace filter better than a 1 inch?

Replacing your standard one-inch air filter with a pleated 5-inch filter can result in better air quality inside your home. That’s because bigger air filters feature higher MERV ratings, leading to better filtration of pollutants and allergens.

Do I need a 5 inch furnace filter?

If your house is one that has a lot of dust, you’ll need to change one and two-inch filters out every month, four-inch filters every two months and five-inch filters every three months. If anyone in your home has allergies, they will benefit from more frequent air filter changes.