Air Filters are the life of your HVAC unit. they keep particles from getting inside and doing damage to the moving parts of the furnace. But they not only protect the furnace, they protect you by improving the quality of the air in your house. The simple answer to this question is: You should change your Air Filters when they are dirty.
Well, Mr. Smart Alec, How do I tell?
Yeah, You’re right, that answer is a bit subjective. The industry rule of thumb is to change you 1″ to 3″ filters every 30 to 60 days. That is a rule of thumb, because there are some differing factors that can go into this time frame.
A household that has a person or people that suffer from asthma or alergies should change their filters more often, or upgrade to a filter that blocks more particulates. In the same respect, a house with many pets will need to change their filters more often because of the pet hair and dander stopped by the filter.
If you live in a heavily populated area or close to a busy road, you will want to change your filters more often than a person living in a rural area.
Seasons, too play a part in how often your air filter should be changed. In the spring and summer months if the unit is not being used as heavily, the filter would not need to be changed. The same goes for homes that are not always occupied. No people or pets= less dust and dirt to get sucked into your filter.
Pre-filtering the air returns too can extend the life of the primary filter on the HVAC unit itself. And remember: Clean filters means less dust in the air, and less dusting you have to do when you are cleaning.
I welcome your comments on this post. I love to hear from you.