Clean or replace the filter in the air handler regularly, not just for clean air, but also because the filter protects the heating and cooling equipment. Dust can clog the evaporator coil, reducing the heat transfer, efficiency, and life of the system..
Trim vegetation away from the condenser for free air flow. Do not enclose the condenser within the trellis or anything else that might block air flow.
Service the system regularly. Servicing is inexpensive and will increase the life and efficiency of the system. A technician typically cleans the condenser coils and checks the refrigerant pressures, adjusting the refrigerant charge as needed.
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