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The Strength of Air Filters Makes a HUGE Difference

man-with-air-filterYou’re looking into installing air filters in your home’s HVAC system, but you aren’t sure what type or strength of air filter is best the job. We’re glad you are considering this, since picking any air filter based on nothing more than guesswork or finding the strongest filter possible can lead to serious problems.

You want IAQ technicians who offer professional HVAC services in Wilson, NC to handle any air filtration system installation. They understand the details of air filter strength and will help you find the ideal filters to improve your indoor air quality.

The Effect of Air Filter Strength

You can guess why an air filter that’s too weak is a problem: it won’t strain out the particles you want removed from the air. But what’s wrong with a filter that’s too strong? Can a filter even be too strong?

Yes, it can—and there is a wide range of filter strengths available, from the most basic plastic filters on window AC units to the filters used for industrial “clean” rooms and sterile facilities. It’s not difficult to end up putting a filter that’s too powerful in place in an HVAC system.

What happens with a filter that is too strong is that it impedes airflow through the ventilation system. Blocking airflow has a number of impacts on the HVAC system. With a variable-speed blower fan, blocking airflow will force the fan to drop to a lower speed and decrease air pressure throughout the ventilation system, and this means a drop in comfort. With a single-speed fan, the filter blocking air will force an increase in pressure throughout the ventilation system, which will create air leaks in the ducts, raise cooling costs, and inflict damage to HVAC components.

The MERV Rating

The strength of a filter is measured my the MERV rating (minimum efficiency reporting value). The higher the MERV rating, the more efficient the filter is at stopping smaller particles. Most residential homes will use filters between 5 to 12 MERV, rarely higher. For a basic comparison, MERV 2 is a plastic window AC filter, and MERV 20 is a filter for scientific facilities that need controlled environments. An HVAC technician will know what type of filter will work to remove contaminants from your house without creating trouble for the HVAC system.

When the Strongest Usable Filter Isn’t Enough

What if the strongest filter that can be safely installed in your HVAC system won’t trap all the unwanted pollutants in your house? Yes, it’s possible. Fortunately, there are other methods to help improve indoor air quality: electronic air purifiers. When the strongest filter cannot do a complete job, technicians will pair the filtration system with an appropriate air purification system to remove the pollutants escaping through the filter. The right combination of air purifiers and air filters can stop more than 99% of contaminants moving through an HVAC system.

Our indoor air quality experts are ready to help you find the right methods to clean and purify the air your household breathes every day.

Call on Comfort Master Heating & Air Conditioning, Inc. for indoor air quality improvements. Serving you is what we do best!

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