Consistent filter changes help to prevent damage to coils that can cause the air handler motors to run at a higher speed to maintain air intake levels.
A higher efficiency filter can lower air flow resistance thus increasing energy savings.
Higher efficiency filters do cost more BUT the yearly energy savings, lower maintenance cost and yearly emission reductions far out weigh the initial expense.
Maintenance cost decrease because the higher efficiency filters have a larger surface area and can last longer so they do not have to be changed as often. This also lowers the amount of filters that have to be incinerated or thrown out.
Some higher efficiency filters offer an average savings of about $10 per year per filter (based on 10 cents per KWh). This meaning that a purchase of a high efficiency filter that cost a few dollars more can offer significant savings to the company AND the environment.
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