Choosing A Furnace Air Filter & How Often To Change Them

Choosing A Furnace Air Filter & How Often To Change Them

October 06, 2019

Choosing The Best Furnace Air Filter For Your Home 

A home’s furnace needs the proper amount of airflow in order to operate at top performance and air filters are an important part of that process. Filters are designed to trap air borne contaminants before they can reach a home’s ventilation system. Because there are so many different kinds of furnace filters on the market today, it can be confusing for homeowners when it comes to deciding which type is the best to purchase.   

Different Types Of Furnace Air Filters 

Fiberglass Filters 

Fiberglass filters can be found in many homes and are the least expensive. Created from soft strands of spun fiberglass, this type of filter is good at trapping large particles in the air before they reach the living spaces of a house. Fiberglass filters are usually sold in bulk, which allows homeowners to keep some extras readily at hand.  

Pleated Filters    

Pleated filters are of better quality than the fiberglass variety, but do tend to cost more. These filters not only remove dust and lint from the air, but also certain allergens, such as mites and pet dander. One drawback to pleated filters is that they tend to make furnaces work harder to push air throughout the home. Sometimes this can lead to premature wear to certain components. However, if you are concerned about allergy problems, pleated filters are a good investment.   

Electrostatic Filters 

Electrostatic filters are great at trapping specific allergens that can cause reactions in people or pets living in the home. Produced from both paper and cotton, these filters generate a static charge that attracts particles to it. Electrostatic filters are much more expensive than their fiberglass counterparts, but they do a superior job of purifying the indoor air all year long. 

Furnace Air Filter Sizes 

In order for a furnace to get the airflow it needs, the filter must be the right size. The wrong filter can not only restrict air movement, but could also allow allergens and other particles to enter the home through the vent system.  
There are a number of different size filters on the market today, but here are some of the most popular ones. 
10 X 20
14 X 20
16 X 24
18 X 30
12 X 12
14 X 24
16 X 25
20 X 20

How Often To Replace A Furnace Filter 

Because home heating systems operate under a variety of conditions, there is no single answer to this question. Industry professionals suggest that fiberglass filters should be changed every 30-60 days. If pets or smokers are present in the home, this interval might need to be shortened. Higher quality filters can last up to six months, but should be inspected every 60-90 days. However, no matter the age of your filter, if it is dirty, change it!

Contact Us Today

For more than 30 years, the highly experienced team at Gregg Mechanical has been there for our customers with our top quality HVAC services. If you are in need of heating/air conditioning repair, replacement or maintenance, help is only a phone call away. We also service water heaters. Concerned about your furnace’s air filters? We would be more than happy to come out and inspect them for you. We are looking forward to serving you with our three decades of knowledge and experience in the HVAC industry! 


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