Inspect each month and change or clean filters as needed. Time intervals frequently vary with each family. The most important aspect of efficient operation of your heating and cooling system is proper air flow. Dirty air filters will severely limit air flow, which can cause the compressor to run continuously or overheat your heat exchanger. Dirty filters could cause a 20 percent or more increase in operating costs. The outdoor units should be free of debris to ensure uninterrupted movement of air. Check out these Filter Tips and our Guide for Indoor Air Quality.
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