Choosing the Right Filter
Caution!
The wrong filter choice may lead to problems!
Filters are rated by the "MERV" system.
What is MERV?
The acronym MERV stands for "Minimum Efficiency Reporting Value". The MERV Rating is the standard method for comparing the efficiency of an air filter. The higher the MERV Rating, the better the filter is at removing particles from the air.
The MERV scale ranges from 1 (least efficient) to 16 (most efficient) and measures a filter’s ability to remove particles from 3 to 10 microns in size from the air.
Filters have two primary functions:
Keep your indoor coil clean to maximize cooling and to increase your indoor comfort by providing cleaner, healthier air to breath.
PROBLEM?
If your duct system was not designed to use a high "MERV" filter (that is very restrictive), your system will suffer from reduced airflow, causing high energy usage, premature rusting, deterioration of your air handler, and possible compressor damage.
Example/Metaphor:
Your air conditioning system is very similar to driving on the Florida Turnpike. Just like the Turnpike was designed to move a specific number of vehicles, your air conditioning system (duct system) needs to move a specific quantity of air. The filter size, if it’s too small and restrictive, is similar to the toll booth with too few lanes. Your airflow will be slowed before it makes its way through the air handler maze and on its way to the "main highway" (main flex supply duct). Most "flex" duct systems in Florida have been designed using a duct sizing calculator for "metal duct" (smooth interior, low restriction). Your highly restrictive "flex duct" system is similar to having the Turnpike’s two outside lanes with rumble strips, causing as much as 30% reduced air flow. In addition, as on the Turnpike, any turns or curves, and exits cause further bottlenecks and slow downs. The same is true for your air conditioning system, causing your systems performance to be greatly reduced.
Solution:
Our professional technicians will perform a static pressure test (similar too having your blood pressure checked) on your duct system to determine the airflow capabilities of your system. This information will inform you as to the maximum "MERV" Rated filter that you can safely use.
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