Your HVAC filter has a big job. It traps airborne particles like pet dander and dust, stopping them from entering the rest of the home. When that filter becomes clogged, your heating and cooling system has to work much harder than it should.
Make that job easier by keeping your HVAC filters clean. (Don’t worry: it’s easy enough to do at home yourself!)
Key Takeaways
- Homeowners should clean reusable HVAC filters every 1 to 3 months.
- Turn off your HVAC system before removing the filter.
- Replace reusable filters if they’re damaged or have reached the end of their lifespan.
- If your HVAC system uses a reusable filter, clean it every one to three months.
- Regular filter maintenance can improve efficiency, reduce energy costs, and help extend the life of your HVAC system.
Step-by-Step Guide to Cleaning HVAC Filters
Here’s a step-by-step guide from the Future Aire team to help you clean your reusable HVAC filter safely and correctly.
Step 1: Turn Off the System
Before touching the filter, turn off your heating and cooling system at the thermostat. This step prevents the blower from pulling dust into the system while the filter is removed and helps keep you safe during cleaning.
Step 2: Open the Return Air Grille or Locate the Air Handler
If Your System Uses Return Air Grille: Locate the return air grille (it’s often on a wall or ceiling inside your home). Open the grille carefully to access the filter.
If Your System Uses Air Handler/Furnace Filters: Locate the indoor HVAC unit, either your air handler or furnace. On this indoor system, there should be a vertical slot where the filter lives.
Step 3: Remove the Filter
Slide the filter out gently. Take a moment to notice the airflow direction arrows printed on the frame so that you can reinstall it correctly later.
Step 4: Vacuum the Filter
Use a brush attachment on a vacuum or an air hose to remove loose dust, pet hair, and debris from both sides of the filter. This step makes rinsing much easier.
Step 5: Rinse with Clean Water
Using a garden hose or sink sprayer, rinse the filter thoroughly with clean water. Continue rinsing until the water running off the filter appears clear.
Avoid using high-pressure spray settings that can damage the filter material.
Step 6: Use Mild Soap for Extra-Dirty Filters
Does the filter still look dirty after rinsing? Fill a bucket with warm water, then mix in a small amount of mild dish soap. Then, gently wash the filter again using this solution until the residue is gone.
Step 7: Shake Off Excess Water
Carefully shake the filter to remove as much excess water as possible. This step helps reduce drying time.
Step 8: Let the Filter Air Dry Completely
Place the filter in a vertical position. Allow it to air dry completely.
Do not place the filter in direct sunlight or use heat sources like hair dryers to speed up drying, as excessive heat can damage the filter.
Step 9: Reinstall the Filter
Confirm that the filter is totally dry. Once confirmed, slide the filter into the return air grille (and secure it) or air handler/furnace. Make sure the airflow arrows point in the same direction they did before removal.
Step 10: Turn the System Back On
Restore power at the thermostat and let your HVAC system run normally.
Congratulations! Your reusable HVAC filter is clean and ready to help keep your system operating efficiently.
Should I Clean or Replace the HVAC Filter?
Not every HVAC filter is meant to be cleaned. Replaceable filters are often meant to be replaced every one to three months, although the exact timeline varies by manufacturer specifications.
Even reusable filters eventually wear out, however. It’s usually time to replace a permanent HVAC filter if:
- Your permanent filter is approximately 5 to 10 years old.
- The frame is cracked or damaged.
- The mesh is sagging or torn.
- Debris remains trapped even after thorough cleaning.
- The filter no longer fits securely in its housing.
Why is Cleaning HVAC Filters Important
Cleaning your reusable HVAC filter offers benefits that go far beyond removing unsightly dust.
Better Energy Efficiency
A clean filter allows free air circulation through your HVAC system. Better airflow means your equipment doesn’t have to work as hard, reducing energy consumption and making your home more environmentally friendly.
Lower Utility Bills
When your system operates more efficiently, it generally uses less electricity or fuel, which can help reduce monthly utility costs.
Longer Equipment Life
Restricted airflow places additional strain on major HVAC components like the blower motor and compressor. Regular filter cleaning helps reduce unnecessary wear that shortens the life of your system.
More Comfortable Indoor Temperatures
Proper airflow allows conditioned air to circulate more effectively throughout your home, helping your HVAC system maintain the temperature you’ve set on your thermostat.
Fewer Costly Repairs
Routine maintenance, including cleaning reusable filters, can help reduce stress on your HVAC system and lower the chances of avoidable breakdowns.
Tips for Caring for Your HVAC System
Be Safe
Cleaning a reusable filter is a simple DIY task, but safety should always come first.
Some basic precautions when caring for your HVAC system include:
- Turning the HVAC system off before removing the filter.
- Wearing gloves to keep dirt and debris off your hands.
- Using protective eyewear if you’re vacuuming or rinsing dusty filters.
Know the Signs of a Dirty HVAC Filter
Your HVAC filter may need attention if you notice:
- Visible dust buildup on the filter
- Visible dust buildup throughout the home
- Reduced airflow from your vents
- Higher-than-normal utility bills
- Rooms taking longer to cool or heat
- You haven’t cleaned the filter in several months
Checking your filter monthly makes it easier to know when it’s time for another cleaning.
Use the Right Products When Cleaning a Permanent Filter
Most reusable filters only need a few basic supplies, like clean water, mild soap, and a vacuum or air hose.
Most manufacturers recommend avoiding harsh chemicals or abrasive cleaners that could damage the filter material.
Schedule Professional Servicing
A clean filter is an important part of HVAC maintenance, but it isn’t the whole picture.
Annual HVAC tune-ups allow a trained technician to inspect electrical components, refrigerant levels, coils, motors, and other critical parts of your system to help keep everything operating safely and efficiently.
Set Up a Replacement Schedule
If your HVAC system uses disposable filters instead of washable ones, replace them according to the manufacturer’s recommendations. Most homeowners replace standard filters every one to three months, although factors like pets, allergies, and indoor air quality may require more frequent changes.
When You Need a Little Extra Help
Cleaning a reusable HVAC filter is one of the easiest ways to help your heating and cooling system perform its best. But if your system still isn’t heating or cooling properly after cleaning the filter, it may be time for the pros to step in.
Future Aire has been helping homeowners throughout the St. Louis area since 1984. Whether you need routine maintenance, repairs, or a complete system replacement, our experienced technicians are here to help keep your home comfortable year-round. As a family-owned Carrier Factory Authorized Dealer, we provide honest service and dependable solutions you can trust.
FAQs
Can I clean an AC filter myself?
Yes, it’s easy for homeowners to clean washable HVAC filters. Just turn off the AC system, remove the filter, hose it down with water, let it air-dry, put the dry filter back, then turn the system back on.
How do I know if an HVAC filter is dirty?
Signs of a dirty HVAC filter include:
- Clear dust accumulation
- Higher energy bills
- Temperatures inside the home are not matching the thermostat settings
- It’s been months or even years since the filter has been cleaned or replaced
How long do reusable HVAC filters last?
The industry standard for a permanent air filter’s lifespan is 5 to 10 years, though this range can vary by brand, model, and maintenance.
Can a dirty air filter cause a sore throat?
An extremely clogged air filter and excessive dust may contribute to allergy symptoms in some people, such as a sore throat and sneezing.
