5 Ways to Save Money and Energy on Air Conditioning So you already have an air conditioner, or you're planning to buy one... Save money and energy these five tips: 1. Adjust the thermostat If you've got central air controlled by a thermostat, use a programmable thermostat to avoid wasting energy by increasing the warmth considerably throughout the day when the home is empty. You will be stunned to search out that the distinction between out of doors and indoor temperatures matters the maximum amount because the temperature within your home. 2. Clean the air filter Whether you have central air or a room air conditioner, a dirty filter will reduce its efficiency, making it use more energy and cost more money to do the same job. Check your HVAC system's air filter monthly and expect to change the filter every three months. 3. Get an annual checkup If you have central air, consider an annual checkup – once should cover both the heating and the cooling season. A professional should be able to diagnose any inefficiency before you've wasted money on monthly heating and cooling bills. 4. Think small Cooling one room with a window air conditioning unit requires much less energy (and investment) than a central air system. Ask yourself how you'll use your new air conditioner, and choose the smallest option that works. The government's Energy Star site has a handy guide to help you choose the right air conditioner for your space. 5. Buy Energy Star Whether you're buying a central air conditioner (which could qualify for a tax credit) or a room unit, efficiency matters. An Energy Star central air system will use about 14% less energy than minimum government standards, and a room air conditioner will save at least 10%. Use the Energy Star Website before making a purchase, because while the vast majority of the 1,000-plus Energy Star window air conditioners barely meet the standards by using just 10% less energy than a standard model, some are clearly a better value.