Frequent question: Do you leave the cardboard on a furnace filter?

Remove plastic packaging and paper insert from filter, leaving cardboard frame intact. Find the airflow arrow and point it toward the AC/heat blower.

Is there a right way to put a furnace filter in?

Pull the old filter out and discard it. On the new filter, find the arrow indicating the proper airflow direction. The arrow must face toward the furnace and away from the return duct that pulls the air in need of heating or cooling. … The arrow on the filter should always point toward the furnace.

What happens if you put air filter in backwards?

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. This could lead to higher utility bills and possibly damage your furnace or air conditioner.

Is furnace filter supposed to stick out?

Your furnace filter shouldn’t stick out at all. If it sticks out, then your furnace efficiency can drop dramatically. If your furnace filter is sticking out, then you do not have the correctly sized furnace filter. The filter should fit into the unit and be easy to slide in and out.

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Does the arrow point up or down on an air filter?

Air filters have arrows printed on the sides of them that show you which way they are supposed to be installed. These arrows should be pointing in the direction that air flows through your system, which is away from the supply ducts and (typically) toward the blower.

Which way should the Arrow face on a furnace filter?

The arrow points in the direction of the airflow. The point should go toward the inside of the furnace compartment. If the filter goes inside the ductwork, it should point toward the air handler or the furnace.

Which way does the airflow on my furnace?

If you are looking at a furnace filter, find the arrow that indicates the proper air flow direction. That arrow must always face toward the furnace and away from the return duct that carries the air in need of heating or cooling.

Which side of furnace filter should be dirty?

In all cases, the furnace filter should be dirty on the side that the air comes into the furnace from. If your air filters are dirty in some other fashion, it is likely your furnace is not working properly, or the filter was installed incorrectly.

Can I use a furnace filter that is too long?

Letting the air filter work overtime

When you leave it in your return duct for too long and it gets caked in dirt, it’s no longer working efficiently. Not only that, it’s actually hurting your heating and cooling system and raising your energy bills.

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What happens if your furnace filter is too big?

The biggest concern when you use the wrong size air filter is that it may not effectively prevent dust from building up on your HVAC system’s motors and blowers. This dirties up your furnace which could affect its performance or possibly harm the system’s internal components, leading to costly repairs or replacements.

What is the main advantage of a pleated filter?

Catch more debris: Pleated air filters have more surface area, so they capture more – and smaller – debris. Depending on the MERV rating, they may filter out pollen, pet dander, bacteria, and some viruses. This makes a pleated air filter a much better choice for anyone with allergies, asthma, or similar sensitivities.