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Where is the air filter located on my furnace?

Author

Avery Gonzales

Updated on March 03, 2026

Where is the air filter located on my furnace?

Your furnace filter will most likely be found in the blower of your furnace. Where the blower is depends on how the furnace was installed. Horizontal HVAC unit - Furnace filter will be located on the intake side, slid into a rack.

Keeping this in consideration, where is my furnace filter located?

In general the furnace filter is located inside the blower compartment. This will vary with the installation of the Furnace. The HVAC (Heating Ventilating and Air Conditioning) contractor can install an Air Cleaner Box, or cut a slot in the return air duct.

Secondly, do all furnaces have air filters? Still, you know that it is in there somewhere because every heating and cooling system in a home has a furnace filter. This applies to all different types of heating furnaces, including gas furnaces, oil furnaces, electric furnaces, as well as air conditioners.

Also to know is, where is my air filter located?

The air filter is typically located at the point where the return duct enters the air handler. Larger houses often have more than one HVAC system. Each system will typically have at least one air filter. Therefore, your home may have air filters located at the air handler AND in the returns.

What happens if you put a furnace 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.

How do I know when to replace my furnace filter?

Watch out for these signs that signify the time to replace your furnace filters.
  1. Your Bills Creep Up. If your bills have been cranking up, dirty and clogged filters might be the culprit.
  2. You're Getting Sick.
  3. You Notice a Burning Smell.
  4. Less Heat, Longer Runtime.
  5. Your Home is Dustier than Before.

How do I change the air filter in my furnace?

  1. To Change Your Home Air Filter, You'll Need To Turn Off Your Furnace.
  2. Find and Locate Your Furnace Filter.
  3. Determine the Size of Your Home Air Filter.
  4. Remove the Existing (old) Air Filter.
  5. Insert the New Air Filter.
  6. Return furnace to “on” position.

Can a furnace not have a filter?

1. Will a furnace run without a filter? Yes, but it will absolutely damage your furnace in the process. Without an air filter, more dust and debris will make it to the core components of your heating system, causing damage to your coils, blower motor, and more.

Is a furnace filter the same as an air filter?

While many people refer to air conditioning and furnace filters as if they're different, this is not the case. Your furnace and your air conditioning system use the exact same filter, so there's no need to worry about purchasing separate filters for each piece of equipment.

Where is the filter on a Bryant furnace?

The air filter may be located in an external filter cabinet which can be attached to the bottom or the side of the furnace cabinet.

Do old furnaces have filters?

Manufacturers of furnaces and furnace filters usually choose a designated location where their filters can be installed just in front of the fan components. This furnace filter location is common when it comes to older heating and air conditioning systems.

How often should I change my air filter?

Here are averages that may help you know how frequently you should get a new air filter at your residence:
  1. Vacation house or single occupant and no pets or allergies: every 6–12 months.
  2. Common suburban home without pets: every 90 days.
  3. One dog or cat: every 60 days.
  4. More than one pet or if anyone has allergies: 20–45 days.

How do you clean an air filter?

Start by filling a clean bucket with water and a small amount of laundry detergent. Submerge the filter in the water and swirl it around, using your hands to aggravate dirt and dust out of the filter material. Then, remove it from the water and shake off any excess, before rinsing it under running water.

Does my house have an air filter?

Where Are My Air Filter Located? If you see a large vent on your ceiling, looking behind it will likely unveil your air filter. Homes with ductwork in the crawlspace or basement often have a floor register which houses the air filter. Wall registers are common in many homes.

Does my furnace have 2 filters?

It is also YES if your house or home has a separate cooling (HVAC or AC) unit and heating (furnace) unit as they both typically share the same air-handler. Since the air-handler is the exact area your air filter resides, both systems share the same filter.

Is there a difference in furnace filters?

The answer is that you're getting a filter that requires less changing and captures more, and smaller, particles. The cheap woven fiberglass filters do one thing—screen out dirt and debris that could damage your furnace blower motor, though they do take out some pollen and mold spores.

Will furnace shut off if filter is dirty?

Dirty filters are the most common cause of furnace problems. Dust and dirt restrict airflow—and if the filter gets too clogged, the heat exchanger will overheat and shut off too quickly, and your house won't warm up. If the blower is running but no heat is coming out, replace the filter.

Do I need both a furnace filter and a return air grill filter?

If your furnace already has filters, either near or in the furnace, then remove that filter and add a filter to each return grille. Keep in mind that return ducts should be sealed to properly filter the system otherwise the leaking return ducts will contaminate the system.

How do I know which way the airflow is on my furnace?

What's The Right Furnace Filter Direction? 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.

Does it matter which way you put an air filter in?

Luckily, most filters are made so they won't fit right unless they're inserted in the correct direction. There should be airflow arrows printed on the side of the air filter to indicate what direction the filter should be inserted. When you insert your new filter, the arrow should point toward the furnace.

How do I know which way the airflow is in my furnace?

Stand in front of the furnace and look for the ducts. 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.

Why does my furnace filter gets black really quick?

Your Air Filter is Severely Clogged
If neither soot nor mold is causing your air filter to be black, it is likely severely clogged. When your air filter is clogged, it can restrict airflow, hindering your home's indoor air quality while damaging your HVAC system in the process.

Which way does Filtrete Air Filter go?

Installing Your Filtrete™ Filter
  • Remove the plastic from the filter—don't remove the cardboard framing.
  • Find the airflow arrow and point it toward the AC/heating blower.
  • Insert the filter into its slot [central unit].
  • Insert the filter into its slot [wall unit]

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