Can you use both sides of an air filter?

Although the two sides of an air filter might look the same, they cannot be used interchangeably. That’s because air filters are designed with one side that is more porous than the other.

Does it matter if air filter is backwards?

Although the two sides of an air filter might look the same, they are not. … By installing your filter backwards, air will have a harder time flowing through the filter and your air handler will have to work harder to make up for the loss of airflow.

Does it matter which way the air filter faces?

Slide the new filter in with the arrow pointing toward the furnace. Replacing your air filter is not difficult. Remember that air flows from your ducts, through the filter, and into the furnace. The arrow on the filter should always point toward the furnace.

Can I use two 1 inch air filters?

Can You Stack Air Filters? Do not stack multiple smaller air filters on top of one another to fit them into a larger air handler. Installing multiple 1” air filters in a 2” slot, for example, can cause costly damage to your AC unit, as residential furnaces are not equipped to handle this level of airflow restriction.

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What happens if I put my air filter in the wrong way?

If you install your filter in the wrong direction, air will have a hard time flowing through the filter’s material and your air handler will have to work overtime to make up for the loss of airflow. This is not only a waste of energy, but it can also possibly damage your air conditioner or heating system.

What happens if HVAC filter is installed backwards?

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.

Which way does an air filter go in the wall?

If your filter is on the ceiling, the arrow should face the ceiling. If your filter is on the wall, the arrow should face the wall.

Do all HVAC systems have 2 filters?

How Many Air Filters Does a House Have? Typically, a house will have 2 air filters in their intake vents. In some cases, there can be more or fewer depending on the square footage of the home or apartment and the number of floors that need to be supported by the central air system.

Can you use a 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.

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Can you stack 4 1 inch air filters?

While a 4-inch-thick filter is more efficient than a 1-inch filter, the right size depends on your furnace. … However, if the slot is less than 4 inches wide, you’re stuck with using that thickness. What you can’t do is stack filters — use only one.