How to Perform Routine Furnace Filter Maintenance to Ensure Efficient Heating

December 16, 2024

A couple of wrenches - tools commonly used when replacing furnace filtersYour furnace filter plays an important role in the long-term heating efficiency of your unit, so ongoing furnace filter maintenance is critical. Your filter is responsible for keeping the air inside your living space clean, healthy, and irritant-free. A functional, well-maintained furnace filter also helps optimize the functionality of your unit, especially when it really counts. Here’s what you need to know to take good care of yours.  

Why Regular Furnace Filter Maintenance Is Important

A clean furnace filter is a must if you’re serious about keeping your unit efficient over the long haul. The biggest benefits of furnace filter maintenance include the following:
  • Dirty filters require furnaces to work harder than they’d otherwise have to, which can drive up heating costs.
  • The cleaner your filter, the better your air quality. Filters help keep dust, pollen, dirt, and pathogens out of the air you breathe.
  • Furnace filter maintenance reduces wear and tear on your unit, maximizing longevity and keeping it efficient during peak heating seasons.
 

How Often Should You Change Your Furnace Filter?

Optimal filter replacement schedule depends on variables like filter size, as well as household variables (e.g. number of pets, filter type, and locational air quality). However, a good baseline frequency is every 1-3 months for 1-2 inch filters, 6-9 months for 3-4 inch filters, and 9-12 months for 5-6 inch filters. When determining how often to change a furnace filter, you should also monitor yours for signs it’s due for replacement ahead of schedule. Examples include:
  • Visible dirt on the filter or an increase in dust around your home
  • Troubling smells coming from your unit (e.g., burning)
  • Unexplained energy bill increases
  • Noticeable changes in vent airflow
 

Tools and Supplies Needed for Furnace Filter Replacement

Keep essential tools and supplies for HVAC maintenance on hand so you’re always ready for your next filter replacement. Keep replacement filters that fit your furnace around so that you can replace them as needed. (Check the MERV rating on your options to ensure peak functionality.) You may also want to get gloves to protect your hands. Vacuums and cleaning supplies can help you keep replaceable filters (and your unit) clean.  

Step-by-Step Guide to Replacing Your Furnace Filter

Ready to learn some key steps for filter maintenance and replacement? Here’s a handy “replace furnace filter” guide to help you along the way. Always refer to your furnace’s instructions or information from the manufacturer for specific details.

Step 1: Turn off the furnace

For personal safety’s sake, it’s crucial to turn off the furnace before maintenance. It also helps prevent damage to the furnace.

Step 2: Locate the furnace filter

In most furnace units, the filter is located at the front of the air handler. (Look for a slotted compartment.) In some cases, the compartment might be covered by a removable sleeve or other protective covering.

Step 3: Remove and inspect the filter

Inspect the furnace filter thoroughly. How dirty is it? Does it show any signs of wear and tear?

Step 4: Replace or clean the filter

If you have a reusable furnace filter, you may be able to gently clean or vacuum it before putting it back. A damaged or very dirty furnace filter, however, should be replaced instead. Always swap out disposable filters with clean replacements from your personal supply on time.

Step 5: Reinstall the filter and power on the furnace

Securely install your cleaned or replacement filter, close the compartment, and reinstall any protective sleeves you may have removed to access it. Then power on your furnace.  

Common Mistakes to Avoid in Furnace Filter Maintenance

Ensuring optimal unit functionality means avoiding critical furnace filter maintenance mistakes. Here are some common HVAC errors to watch out for:
  • Installing filters backward: Follow product directions and double-check orientation to ensure this doesn’t happen.
  • Using the wrong filter size: Know which size filter your unit requires. Write it down and keep it available to refer to when shopping.
  • Not performing regular checks: Regular checks help you spot filter problems or damage early and keep them from affecting your unit or air quality.
 

How Clean Filters Contribute to Overall HVAC Efficiency

When it comes to important HVAC efficiency tips, maintaining a clean filter is at the top. Old or damaged filters can’t maintain the air quality you need to stay healthy. Clogged filters reduce airflow, forcing your furnace to work harder to do the same job. In other words, the benefits of a clean furnace filter are numerous, including lower energy bills, improved health, and maximum unit longevity.  

Frequently Asked Questions About Furnace Filters

Still have questions about filter replacement? Here are some common furnace filter questions to consider.

What type of furnace filter should I use?

The best furnace filter type for your unit is more than just the right size. You should also consider factors like thickness and MERV ratings. Thicker filters can improve air quality but may force your unit to work harder. MERV ratings tell you how well a filter removes particles from the air. For more specifics, refer to your furnace’s instruction manual or manufacturer’s information – or consider professional furnace maintenance services.

Can I clean and reuse my furnace filter?

Yes, you can, if it’s a reusable furnace filter. Reusable filters cost more upfront but are better for the environment and last longer, in general.

How do I know if my furnace filter needs replacing?

Check it for dirty filter systems like visible dirt and obvious signs of age or wear and tear (e.g. holes). It’s impossible to overstress the importance of furnace filter maintenance. Not only does it extend the lifespan of your unit, but it helps it do a better job of keeping your air warm and clean, as well.

Are there other filters in my HVAC systems I should be aware of? 

Yes! Working filters are a crucial part of central air conditioners as well, and should be part of your routine HVAC system maintenance checklist.


Still Have Questions About Furnace Filters Or Maintenance?

Need additional assistance with your furnace maintenance or need your furnace replaced? Get in touch with one of Pro West’s certified furnace technicians today!

Call 604-990-7550