How Often Should you Replace a Furnace Filter
Your furnace filter is one of the most important components in your HVAC system, yet many people never think about it. In fact, a good majority of homeowners forget to replace their filters on time, which can create a variety of problems, from extreme energy bills to poor air quality.
When you regularly replace your furnace filter, you can improve your system’s airflow and get better energy efficiency from your system. It’s also one of the easiest ways to extend your system’s lifespan!
At Miller’s Heating & Air, we make it easy to get the right furnace filter for your home with our new online shop. No more guessing or last-minute trips to the store. Just head on over to our digital storefront and get the best furnace filters for home with just a few clicks.
Need a new furnace filter? Shop online now for high-quality filters!
How Often Should You Replace a Furnace Filter?
The question most of you probably have is, How often should I change my furnace filter?
The answer depends on the type of filter you use and the conditions in your home. Let’s take a look at some standard recommendations:
Basic fiberglass filters – These should be replaced every 30 days.
Pleated filters – With longer-lasting materials, these often need to be replaced every 60-90 days.
High-efficiency filters (HEPA or MERV 13+) – These can last anywhere from 6-12 months, depending on the conditions.
Homes with pets/allergies – If you live with furry friends or severe allergy victims, we recommend changing your filter every 30-60 days.
Heavy HVAC usage (extreme heat/cold) – If you’re using your system a lot, replace your filter every 30 days or so.
New construction/remodeling homes – You’d be surprised by just how much dust construction can leave behind. If you’re remodeling your home or living next door to new constriction, replace your filter every 2-4 weeks.
Keep this chart to help you remember when to replace your furnace filter:
What Happens If You Don’t Replace Your Furnace Filter?
If you ignore your furnace filter, it can be very problematic. Here are some of the biggest consequences of forgetting to change your filter:
Restricted airflow: When your filter is clogged, your system has to work harder. This often equates to higher energy bills.
Poor indoor air quality: Dirty filters let dust, pollen, and other allergens circulate throughout the home. If you or someone in your household has have allergies or respiratory concerns, having a dirty filter can be dangerous.
Increased wear & tear: When you don’t replace your filter regularly, you set your HVAC system up for failure in the short run.
Higher risk of breakdowns: Clogged filters can overheat your system. In the worst cases, overheating can lead to complete system failure.
Mold growth risk: Over time, moisture will get trapped in your filter, creating the perfect breeding ground for mold.
Signs It’s Time to Change Your Furnace Filter
Besides the chart above, it is useful to know the signs that show when to change your furnace filter. Here are some of the most tell-tale signs:
Visible dirt and dust buildup on the filter: If your filter is looking grimy, it’s time for a change.
Weaker airflow from vents or uneven heating: A clogged filter can restrict airflow and make for inconsistent heating and cooling.
Unexplained increase in energy bills: If your HVAC system is working harder than it needs to because your filter is dirty, you’ll end up spending more on energy bills than you need to.
More allergy symptoms or respiratory issues: If you or your family members notice your allergies getting worse, it might be the fact that old dirty filter could be to balance.
Musty or burning smell when the furnace runs: If you get any unpleasant odors when you flip your system on, it’s likely an issue with your filter.
Choosing the Right Furnace Filter for Your Home
Selecting the best furnace filters for home depends on several factors, including the type of HVAC system and the general needs of your household. Here’s what to look for:
MERV Ratings (Minimum Efficiency Reporting Value): MERV ratings determine how well a filter traps particles. Higher MERV ratings = better filtration:
MERV 8-11: Standard filters for dust and pollen.
MERV 12-13: Great for pet owners or people with serious allergies.
HEPA Filters: Captures bacteria, smoke, and fine particles for the cleanest air possible.
Filter Size Matters: Always check your furnace manual or existing filter for the correct size.
Disposable vs. Washable Filters:
Disposable filters: These are very effective and convenient. Simply replace them every few months.
Washable filters: While you can save money in the long run with these eco-friendly filters, you’ll need to keep up with cleaning them every now and then.
Need to find the perfect filter for your home? Check out our selection of furnace filters.
Where to Buy Furnace Filters Online
Why go through the hassle of in-store shopping when Miller’s Heating & Air’s online shop has a wide selection of quality filters at competitive prices? With our easy ordering system, ultra-fast shipping, and scheduled deliveries, you never need to worry about remembering to replace your filter again!
How to Replace Your Furnace Filter (Step-by-Step Guide)
Replacing your furnace filter is easier than you might think! Just follow these steps:
Turn off your HVAC system: Safety first! Turning your system off will keep debris from circulating while you work.
Locate the filter slot: This is usually near the blower compartment.
Remove the old filter: Check the arrow on the side of the filter to make sure you’re inserting the new one correctly.
Insert the new filter: Make sure the arrow points in the right direction.
Turn the system back on: Sit back and enjoy cleaner air!
Pro Tip: Set a reminder on your phone or sign up for an auto-delivery service so you never forget to replace your filter!
Frequently Asked Questions (FAQs)
How do I know which filter size to buy?
You can either check your existing filter or HVAC manual for the correct size. If you’re still unsure, get in touch with us for help!
Can I clean and reuse my furnace filter?
You can’t reuse your furnace filter unless it’s a washable electrostatic filter.
Are expensive filters worth the cost?
Higher-rated MERV filters can be worth the cost if you need the best air quality system performance.
What’s the best filter for pet owners?
If you live with pets, we recommend getting a MERV 11-13 filter. These filters are best for trapping pet dander, hair, and allergens.
