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Air Quality Frequently Asked Questions

Air Quality FAQ’s

What is a MERV rating?

The MERV (Minimum Efficiency Reporting Value) is a test designed to reduce the confusion of an air filtration device’s performance by looking at the minimum or worst case scenario for a product’s performance. MERV tests an air filter’s efficiency on 3 size ranges of particles, large particles 3.0 – 10 microns, medium size particles 1.0 – 3.0 microns and small particles 0.30 – 1.0 micron. Two products may have the same MERV rating, however may differ in initial particle size efficiency, initial air resistance, air leakage, bypass air, service life and tested airflow. The standard requires the test to be conducted at 1200 CFM. Not all manufacturers test at 1200 CFM. A reduced airflow will allow the air filtration device to have a higher MERV rating. Since MERV does not look at performance over time, a product may have a lower MERV as it begins to filter particulate. MERV also uses test dust that contains carbon. As a result no Electronic Air Cleaner can be tested under the MERV. The carbon negates the electronic section of the air cleaner.

 How often do I have to maintain the Aprilaire Model 2210, 2310 and 2410 and what is involved in maintaining it?

Aprilaire recommends that you replace the filter media every year. However, all HVAC installations are different and your contractor may recommend more or less frequent media replacement. Maintenance is simple, and requires no tools, washing or vacuuming. Simply replace the filtering media - an operation that takes less than a minute.

Will an Aprilaire Air Cleaner help enhance the life of my heating and cooling equipment?

Yes. By removing dust that would normally accumulate in the blower compartment or on the air conditioning coil, the Aprilaire Air Cleaner will reduce the amount of wear and tear on your expensive equipment, extending its life span.

What are the benefits of fan cycling?

Fan cycling mixes and evenly distributes air throughout the home, helps eliminate hot/cold spots in the home, and can improve the performance of your air cleaner, dehumidifier, and humidifier.


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