Where are my air filters located?

Isn’t it amazing how a task that should be simple and easy can quickly snowball into something more complicated? This seems to be particularly true when it comes to dealing with home improvement. We believe that replacing your air filter should never be a source of frustration. So before you throw your hands up in the air with utter frustration, let’s take a moment to focus on how to find your air filter. 

Key Takeaways:

• Check Your HVAC Manual: Start by consulting your HVAC system's owner's manual for specific guidance on your air filter's location.
• Find Your Air Handler: Locate your air handler, typically found in attics, basements, crawlspaces, garages, or closets in smaller homes.
• Know Your System Type: Air filter locations vary depending on your HVAC system—vertical up-flow, vertical down-flow, horizontal, or central air return.
• Need Help?: If you're still unsure, schedule an appointment with Filterbuy HVAC for expert assistance.

Step 1: Consult Your HVAC Owner’s Manual

Always consult your HVAC system's owner's manual first. This manual will typically have a diagram outlining the location of your air filter and may even include instructions for replacing it. If not, we have a blog on that.

Step-by-step on how to replace your air filter

Step 2: Locate Your Air Handler

Your air filter is typically installed near your air handler, which is the indoor component of your HVAC system. If you’re not sure where to find it, check these common locations:

• Attic
• Basement
• Crawlspace
• Garage
• Closet (in apartments or smaller homes)

Once you locate your air handler, finding the air filter should be straightforward. However, its exact position will depend on your system type.

Step 3: Identify Your HVAC System Type

The location of your air filter depends on your HVAC system. Here’s where to look for each type:

Vertical Up-flow System

Air is drawn in at the bottom and expelled at the top.
Common in basements or crawlspaces.
Filter location: at the bottom of the unit.

Vertical Down-flow System

Air is pulled in at the top and expelled at the bottom.
Effective for homes with high ceilings.
Filter location: at the top of the unit.

Horizontal System

Air moves parallel to the ground, making this system ideal for spaces with limited vertical space.
Typically found in attics, garages, or basements.
Filter location: on the side of the unit (installed vertically).

Central Air Return Register/Vent

Found in homes with central air systems.
Central air return vents are usually in common areas like floors, ceilings, or near stairwells.
Filter location: just inside the vent, often removable with a screwdriver.

Are you still unsure of where to find your air filter? Set up an appointment with Filterbuy HVAC for your next servicing and ask your technician to point out your air filter’s location.

Frequently Asked Questions

How do I find my air filter at home?

Your air filter is usually located in the return air ducts or the blower compartment before the air reaches the furnace.

Where is the air filter located?

It’s typically in the return air ducts of your HVAC unit, just before the air enters the furnace.

How many air filters does a house have?

The number of filters depends on the number of HVAC systems in your home. Most systems have at least one filter, but larger homes with multiple units may have several.

Does my outdoor AC unit have a filter?

Yes, outdoor AC units have filters. They usually protect the evaporator coil from dust and debris inside the unit.

Where is the air filter on my outdoor AC unit?

The filter is generally located inside the outdoor unit, near the evaporator coil, to prevent dirt and debris from reaching it.

Where can I buy an air conditioner filter?

Air conditioner filters are available at home improvement stores in the HVAC section and online on various appliance and home improvement websites.

Why can’t I find my AC filter?

If you can’t locate your AC filter, it might be hidden in less obvious areas like the air handler or furnace compartment. Some units also use washable filters that don’t need frequent replacement.

How do I know if my air conditioner has a filter?

Check the user manual or inspect the unit for a filter slot or compartment. Most AC systems are designed to include a filter.

Do all home AC units have filters?

Yes, all home AC units come with filters. They are essential for maintaining clean air and protecting the system from dust and debris.

What happens if I don’t change the AC filter?

Not changing the filter can reduce your AC’s efficiency, increase energy consumption, lower indoor air quality, and potentially lead to overheating and system failure.

Can my AC run without a filter?

While your AC can run without a filter, it’s not recommended. Operating without a filter allows dust and debris to clog the system, reducing efficiency, causing damage, and lowering indoor air quality.

Is it OK to use an AC without a filter?

No, it’s not OK. Filters improve air quality and protect your AC from damage. Running the system without a filter increases energy costs and potential breakdowns.