Furnaces keep our homes warm, and furnace filters keep our furnaces clean
and working properly. Learn why, when, and how to change your furnace
filter in this short post. For more information, be sure to contact a
heating technician in your area.
The Reason Behind Changing Your Furnace Filter
Furnace filters are designed to protect a furnace's blower motor from
excess dirt and dust. When a filter is too dirty, air in unable to move
properly through your heating system. Lack of airflow caused by a dirty
filter can cause your furnace to overheat and shut down. (The same thing
happens with air conditioners: a dirty filter will cause coils to freeze
up and will shut an AC down.) When a heating system overheats, it may
suffer other damages that will require an
HVAC professional to repair. Avoid these damages by changing your furnace filter regularly.
When to Change Your Furnace Filter
Many homeowners think that changing their furnace filters once a year will
suffice. However, changing your furnace filter only once a year will likely
shorten the life of your furnace. To prevent costly repairs, get into
the habit of checking your filter monthly and often change it monthly,
depending on the type of filter you use. To determine if your filter is
dirty enough to be changed, remove the filter and hold it up to a nearby
light. If you can no longer clearly see light, it's time to change
your furnace filter.
How to Change Your Furnace Filter
Changing your furnace filter is quick, easy, and will save hundreds to
thousands of dollars if done regularly. Here's a quick step-by-step guide.
1. Turn off your
2. Remove the existing furnace filter. (It's usually found inside the
furnace or the return air vent.)
3. Look for an arrow indicating airflow direction through the filter. (This
will help you know that your next filter is facing the right way when
you install it.)
4. Find the right replacement for your furnace. Disposable filters are
typically 1 or 2 inches thick. Find one that fits your furnace at a local
hardware store. (There are some furnaces that can handle up to 5-inch
filters. Check yours to make sure.)
5. Install your new filter by sliding it back into place. (Make sure it's
facing the right direction.) Make note of when you changed it, so you
know when to check it again.
Questions? Contact a Heating Professional
For questions about changing furnace filters and other heat-related issues,
it's best to
contact a heating professional in your area for detailed advice and assistance.