Furnace filter information — CNET

Furnace filter guide — CNET

How typically do you clear or exchange your furnace filters?


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Homeownership comes with what appears like a endless to-do listing. One necessary job on that listing is guaranteeing your heating and cooling system is correctly maintained. You need to be changing your furnace’s air filter frequently to maintain your HVAC system working correctly and guarantee your loved ones has good air high quality in your house. Hold studying to find out how furnace filters work, how typically you need to exchange yours, what sort of filter to get and extra.

Learn extra: Furnace shopping for information: Discover the most effective furnace to your residence

How furnace filters work

Earlier than we speak about changing your furnace filter, let’s discuss in regards to the function these filters serve and the way they work. The job of a furnace filter is to lure contaminants from escaping by means of your residence’s heating and cooling system.

There are two causes it is necessary to filter out these contaminants. First, a great furnace filter will maintain the air in your house cleaner by trapping any airborne contaminants. That is particularly necessary for anybody with allergic reactions or bronchial asthma, because the filter helps take away pollen, mud and different allergens.

The opposite purpose the filter exists is to guard your HVAC system. And not using a filter, grime and different particles can accumulate in your heating and cooling system, affecting your vitality invoice and requiring you to exchange your HVAC system sooner.

How typically to exchange a furnace filter

As you may inform, your furnace filter serves an necessary job in your house. Consequently, it is necessary to exchange it frequently to make sure it will possibly proceed to do its job effectively.

So how typically do you have to exchange your air filter? That will depend on a couple of elements. First, how typically you exchange your filter will depend on the thickness of your air filter. Most filters ought to be changed each three months. For thicker filters, you could possibly lengthen that by a number of months. In case you aren’t certain, verify the producer’s suggestion for the particular filter you’ve got bought.

However the thickness of your air filter is not the one issue to think about. For instance, when you have somebody in your house with allergic reactions or bronchial asthma who requires higher indoor air high quality, you could need to exchange your filter extra typically. 

Moreover, when you have pets at residence creating fur or dander, or a big household to usher in extra contaminants, you may additionally want to exchange your filter extra typically. Alternatively, if the house is primarily a trip residence that is not used typically, you could possibly lengthen the period of time earlier than you exchange the filter.

Discovering the precise filter to your furnace

If you exchange your air filter, it is necessary that you just discover the precise filter to your residence. Not all filters are created equally, and your heating and cooling system might require a sure sort.

First, you should definitely purchase the precise measurement filter to your HVAC system. Frequent filter sizes are 16×20, 16×25 or 20×25 inches. You possibly can verify the filter you presently must see what measurement it’s.

Along with choosing the proper measurement, you will additionally must determine what sort of filter you need. There are a number of differing kinds, every of which has totally different benefits. The commonest sort of filter is fiberglass — one of these filter is usually about an inch thick and catches massive contaminants. It might not be adequate when you have somebody in your house with bronchial asthma or allergic reactions, since it will possibly fail to lure smaller contaminants.

Different sorts of filters embrace:

  • Disposable pleated: One of these filter is manufactured from cotton or polyester, is ready to catch small particles, and is probably the most inexpensive. One of these filter ought to be modified extra typically.
  • Disposable electrostatic: Made from self-charging electrostatic paper or cotton fibers, one of these filter can lure small dangerous particles. One of these filter is barely dearer than the disposable pleated however inexpensive than a few of the increased high quality filters beneath.
  • Everlasting electrostatic: One of these filter is much like the disposable electrostatic one, however is everlasting. You possibly can take away it and clear it, and even wash it within the washer. They’re dearer however do not have to be changed, saving you cash in the long term.
  • Excessive-efficiency pleated: One of these filter is thicker than many others, typically as much as 4 or 5 inches. One of these filter can lure the smallest particles, creating the most effective air high quality. One of these filter is dearer and cannot be used with all filters.

Methods to change a furnace filter

Now that we have talked about how typically to exchange your air filter and what sort to get, let’s speak about how one can go about changing your filter. Here is a simple step-by-step information to changing your air filter:

1. Flip off your furnace. 

2. Find your filter compartment and take away the door or service panel.

3. Slide the previous filter out.

4. Slide the brand new filter in.

5. Flip your furnace again on.

The underside line

Your furnace’s air filter is a vital a part of guaranteeing you’ve good air high quality in your house and lengthening the lifetime of your HVAC system. They’re simple to exchange, nevertheless it’s vital that you just exchange them frequently and purchase the precise sort of filter to your furnace. When you’ve got questions on your furnace or aren’t certain the place to start out with changing your filter, you should definitely contact a certified skilled for assist.

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