Changing furnace filters is an essential task that should never be skipped. A dirty filter negatively affects the performance of the heating system, resulting in diminishing energy efficiency, comfort, air quality and equipment longevity. On the job for 42 years, Temperature Control encourages diligence when it comes to the upkeep of every make and model of residential and commercial heating system. We provide the services you need to optimize equipment value.

The furnace filter captures airborne contaminants such as dust, dander, pollen and all sorts of particles. While clean filters benefit indoor air quality, the primary purpose is to prevent debris from getting inside the heating and cooling system. Any buildup of dirt, grime or particulate within the inner workings restricts airflow and forces the equipment to run longer and more often. There’s greater wear and tear, an elevated risk of malfunction and you’ll pay more every month.

When Should I Replace My Furnace Filter?

How often the filter needs to be changed depends on the type of filter. In the product information, the manufacturer indicates the recommended replacement frequency. Thicker filters are able to trap more pollutants and necessitate less frequent changes. The efficiency or MERV rating (minimum efficiency reporting value) also makes a difference. The general rule for replacements is:

• Replace 1- to 2-inch filters every one to three months

• Replace 3- to 4-inch filters every six to nine months

• Replace 5- to 6-inch filters every nine to twelve months

The occupancy, number of pets, heating/cooling usage and issues with allergies or asthma also impact how often you’ll need a new filter. Larger households, shedding dogs or cats and air quality issues reduce the effective service of the furnace. Temperature Control recommends checking the condition of the furnace filter every month. Replace it when you notice the surface media covered in pollutants.

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