Can you cut air filters to fit?
Christopher Snyder
Updated on June 16, 2026
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Also know, what happens if you use the wrong size air filter?
Dirty or Wrong Size Air Filter - As the ACfilter clogs with dirt and debris, the efficiency of thesystem plummets, causing you to pay extra money for lesscooling power. In addition, the air conditioner blower hasto work even harder than normal, which can lead to internaldamage.
do more expensive air filters work better? If it fits, it's fine. Air filters removedifferent sizes of particulates from the air before theair flows through the blower and into the rest of your home.Longer run times use more energy, cost youmore money, and even worse — reduce the blower motor'slifespan eventually leaving you an expensive repairbill.
Similarly, you may ask, can you cut air filter?
Use scissors and cut our new air filterfrom your Natural Aire 'Cut to Fit' Air Filter. Tip:Using the 'Cut to Fit' air filters is about ½of the price as pre-cut filters and cutting them tosize only take about 5 minutes.
Do pleated air filters restrict airflow?
Because they restrict airflow to your HVACsystem. Pleated, high-MERV filters definitely capturea lot of pollutants, but they also restrict the movement ofair into your blower or furnace. As a result, the fan has towork harder to heat and cool your home, reducingefficiency.
Related Question AnswersWhat is the most common air filter size?
The most common furnace filter sizes are10 X 20, 14 X 20, 16 X 24, 18 X 30, 12 X 12, 14 X 24, 16 X 25, 20 X20, 12 X 20, 14 X 25, 18 X 18, 20 X 24, 12 X 24, 14 X 30, 18 X 20,20 X 25, 12 X 30, 15 X 20, 18 X 24, 20 X 30, 12 X 36, 16 X 20, 18 X25, 4 X 24, and 25 X 25, and these sizes range in depth from1 to 6 inches.What happens if I put my furnace filter in backwards?
The most common problem you will face with abackwards facing filter is simple inefficiency.If your furnace is forced to blow air throughthe non-porous end of a filter, it will take moreenergy to do so. The blower will be overworked andyou will pay more money for your heating.Is a thicker air filter better?
Most air filters are 1 inch thick, butsome systems can accommodate filters 2 to 5 inchesthick. In our tests, we found that the thicker thefilter, the better it works and the longer thereplacement intervals. That means it's better for you andfor your HVAC system.Does higher MERV rating restrict airflow?
High MERV ratings can restrictairflow. For the most part, filters are able to get high MERVratings by using denser material. However, a denser filter canmake it harder for your furnace to push air through, which candecrease your system's efficiency.How do you determine furnace filter size?
Furnace filters are sized by width,length and thickness. The size on the filteris usually expressed in inches (example: 16"x20"x1"). Afilter that is the wrong size will typically not fit,or may not stay in place, once installed. The owner's manualfor your furnace should tell you what size youneed.Does arrow on air filter go up or down?
It means the arrow faces the unit, or in otherwords, facing inside the space you're putting it into. Assumingyour unit is outside or in your attic, you want the arrow toface the unit. Let's make this simpler though. Make thearrows face the ceiling or wall.What size air filter should I buy?
Follow these 3 easy steps:- Follow these 3 easy steps:
- Step 1 - Measuring Length and Width (L x W).
- Step 2 - Measure the thickness of your filter from front toback.
- Step 3 - Put Your Measurements Together (L x W x D).
- It's as simple as that - You are now ready to buy the rightfilter for your AC or Furnace.