Choose the right-sized air conditioning system. If it is too small, then it won’t cool properly; if it is too large, then it won’t dehumidify properly.
Invest in a 11-14 SEER model. 11-14 SEER are recommended for their combined performance in increased energy efficiency and product reliability.
Beware of replacing only one of the two main components if shopping for a replacement system. Replacing only the indoor or the outdoor unit of a system may result in a mismatch that compromises efficiency. Contractors also said these systems are more repair-prone than systems where the two units have been bought and installed together.
Think twice about buying a zoned system. Contractors said that zoned systems (which alter airflow to different zones in the house) require more cooling-equipment repairs than regular systems.
Look for an experienced contractor. One-fifth of the contractors surveyed said the primary reason for their service calls was improper application or incorrect installation.
Maintain your system properly. At least 40 percent of surveyed contractors said that service calls were primarily the result of improper maintenance.
