Insulate the Ducts Ducts should always be insulated, and this is, even more, the case if they are located in crawlspaces or in attics. Keep the Compressor Clean The compressor is the part of the unit that is located outside, and you’ll want to head out there once a week and after windy storms to ensure that there is no debris lodged in the fins and that there are at least 24 inches (two feet) of space cleared around all sides. If you are looking for professional air conditioning services, you can refer to the air conditioning contractors NJ.