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HVAC Air Filters Come in All Shapes and Sizes.

Updated: May 1

HVAC air filters play a critical role in maintaining the indoor air quality of your home or office. They trap pollutants and prevent them from circulating in the air you breathe. However, not all filters are created equal, and the size of the filter you need depends on the size of your HVAC system.



The most common filter sizes are 1-inch, 2-inch, 4-inch, and 5-inch. The size of the filter you need depends on the size of your HVAC system. For example, if you have a small system, a 1-inch filter may be sufficient. However, if you have a larger system, you may need a 4-inch or 5-inch filter to ensure optimal performance. It's important to note that using the wrong size filter can cause problems, such as reduced airflow and increased energy consumption.


The top three HVAC system manufacturers in the USA are Carrier, Trane, and Lennox. Carrier offers a wide range of HVAC systems, including central air conditioners, heat pumps, and ductless systems. Their filters come in a variety of sizes, including 1-inch, 2-inch, 4-inch, and 5-inch. Trane also offers a wide range of systems, including air conditioners, heat pumps, and furnaces. Their filters come in sizes ranging from 1-inch to 5-inch. Lennox offers central air conditioners, heat pumps, and furnaces. Their filters come in sizes ranging from 1-inch to 5-inch.


In conclusion, choosing the right size HVAC air filter is important for maintaining indoor air quality and ensuring optimal performance of your HVAC system. The size of the filter you need depends on the size of your system. It's essential to check the manufacturer's recommendations for the appropriate filter size. Purity Air offers a wide range of filter sizes including filters that fit all the major manufactures such as Carrier, Trane, and Lennox. If you're unsure about the right filter size for your HVAC system, consult with an HVAC professional.


Switch to a reusable filter frame and decrease maintenance cost and environmental waste.

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