Although your first thought for cooling may be air conditioning, there are many alternatives that provide cooling with less energy use. A combination of proper insulation, energy-efficient windows and doors, daylighting, shading, and ventilation will usually keep homes cool with a minimum of energy use in all but the hottest climates. Although ventilation should be avoided in hot, humid climates, other approaches can significantly reduce the need to use air conditioning. Before choosing a cooling system, you may want to familiarize yourself with the principles of heating and cooling.
Set your programmable thermostat as high as is comfortable in the summer, and raise the setpoint when you’re sleeping or away from home.
Clean or replace filters on air conditioners once a month or as recommended.
Turn off kitchen, bath, and other exhaust fans within 20 minutes after you are done cooking or bathing; when replacing exhaust fans, consider installing high-efficiency, low-noise models.
During summer, keep the window coverings closed during the day to block the sun’s heat.
Select energy-efficient products when you buy new cooling equipment. Your contractor should be able to give you energy fact sheets for different types, models, and designs to help you compare energy usage. See the efficiency standards for information on minimum ratings, and look for the ENERGY STAR when purchasing new products.