The general rule is to change a furnace filter—usually located behind a return-air vent or in a slot on the furnace itself—at least once every 90 days.
What happens if you don’t clean your furnace filter?
Short Cycling. If the air filter is not serviced often enough, it will eventually become clogged to the point that air cannot pass through it. When the furnace is operating, the lack of air flow will trap the heat in the system. … Without a new air filter, the furnace will overheat every time it starts up again.
How do I know if my furnace filter is dirty?
What Are the Symptoms of a Dirty Air Filter?
- Filter is a different color. …
- Energy bills are higher than usual. …
- Low air flow. …
- Rise in physical issues. …
- Headaches. …
- Allergies. …
- Carbon monoxide poisoning. …
- Forces HVAC systems to work harder.
How often should you change the furnace filter in the winter?
Professionals, like our team at Airco Service, Inc. say that you should change your air filter at least every three months. During the winter, when you rely on your heating system more, you want to increase that frequency. During the winter, when the system is in constant use, change it out every month.
Why is my furnace filter so dirty every month?
You’re using a filter that is too thick.
The job of your filter is to catch contaminants as the air passes through, such as pet hair, dander, and dust. If you’re using a heavy, pleated filter, it’s going to catch more that tries to come through.
How long do furnace filters last?
Change Your Filters Regularly
For example, a one inch furnace filter should be changed out every one to three months. A three to four-inch filter can last for six to nine months. If you have a thick five to six-inch filter, it can last from nine to twelve months.
Can you vacuum and reuse furnace filters?
Some air filters — permanent and semipermanent models — can be cleaned as part of regular HVAC system maintenance and replaced for continuous use. … At regular intervals, you must remove it from the HVAC cabinet, throw it away, and install a fresh filter. Disposable air filters shouldn’t be vacuumed or moistened.
Why are my air filters so dirty?
Ducts that have holes, gaps, or leaks should be sealed up properly to prevent good air from getting out and bad air from getting in. If there is a leak in the return air ducts, the dusty, dirty air from spaces like that attic or crawl space gets sucked up into the ducts, dirtying the air filter and causing clogging.
Can you get sick from a dirty furnace filter?
A dirty air filter doesn’t just cause you to feel sick… A clogged filter can cause your heating and cooling system to become inefficient. All air passing through your systems must go through the filter. If the filter is dirty and full of dust, airflow is restricted.
Will a dirty filter Keep furnace from working?
As the filter gets dirty, it is harder for the air to move through the filter and go throughout the house, which causes the furnace to work harder. The blower motor requires more energy to push air through a dirty filter, which can cause the furnace to wear out faster.
Why does my furnace filter get dirty so fast?
Leaky Duct Work
According to ENERGY STAR, a typical house loses 20-30% of air through leaks in the duct work and poor duct connections. Leaving these untreated can not only kill your furnace filter quickly, but also result in higher energy bills.
How often should you change 1 inch furnace filter?
In general, this is how often changing furnace filters needs to be done: For 1- to 2-inch filters, replace them every 1 to 3 months. For 3- to 4-inch filters, replace them every 6 to 9 months. For 5- to 6-inch filters, replace them every 9 to 12 months.
How often should a 4 furnace filter be changed?
4” furnace filters should be replaced every 6-9 months. 5” furnace filters should be replaced every 9-12 months.
Is no air filter better than a dirty one?
Running your air conditioner without a filter is worse than running it with a dirty one. Instead, get to the store as soon as possible for a replacement or call an HVAC professional for replacement. Without a filter, your air conditioner is at risk for severe and expensive problems.
How often should I change air filters in my house?
Here are averages that may help you know how regularly you should get a new air filter at your residence:
- Vacation house or one occupant and no pets or allergies: every 6–12 months.
- Ordinary suburban home without pets: every 90 days.
- One dog or cat: every 60 days.
- More than one pet or if anyone has allergies: 20–45 days.
How dirty should an air filter look?
1) Your Air Filter Looks Dirty
If your air filter is clean, it should be white or off-white. Over time, as dust and dirt accumulate on it, the air filter will get darker and the dirt will be noticeable. When it starts looking dark and grimy, you might be due for a replacement.