How Often Should You Change Your Furnace Filter

April 04, 2019

You should, without a doubt, change your furnace filter every…

Oh wait, there’s actually no hard and fast rule for how often you should change your furnace filter. The easy answer is that you should inspect it every month and change it when it’s dirty. But let’s dig a little further into this question.

How often should you change your furnace filter?

Here’s a general rule to get us started:

  • One and two inch filters need every two months.
  • Four inch filters need changed every four months.
  • Five inch filters need changed every six months.

But these numbers actually can vary. Oftentimes even one-inch filters can last longer than a month.

Other factors to consider

Several factors come into play when deciding how often to change your filter. If you have more than one of the following situations, you’ll need to change filters more often.

The first factor is what kind of filter you have. Cheap air filters need replaced more often thank the more expensive kind. So check the package to see how often the filter needs replaced.

If you have allergies, then you will want to change your air filter more than the recommended amount.

The same goes with pets. If you have animals in the house that shed, then that hair is likely getting into the air ducts. This means you’ll need to change filters more often.

If your home is particularly dusty, you may have to change it more often. If your home is dust-free, then your filters will last longer.

Keeping your furnace fan on all the time will mean you need to change the filter more often.

Keeping the windows open in your house will let in more dust and allergens. You’ll need to change filters more often.

The bottom line here is that you want to have a clean air filter. Dirty air filters force your heating and cooling system to work extra and lead to an increase in your energy bill.

A spring air conditioner cleaning will make sure your heating and cooling system is running at optimal efficiency.

Call Kohles & Bach to schedule yours today.