Check home insulation levels. Adding insulation to the attic is one of the easiest and least costly ways to increase your home's energy efficiency and reduce heating and cooling bills.
Check for air leaks. Stop any air leaks around windows or doors with spray foam insulation or caulking.
Check the water level in the swamp cooler. Water should reach to one inch from the top of the tray.
Replace exterior finishes with light colored roofing or siding. There are a number of roofing and siding products available that are labeled "cool" according to Energy Star standards. These products can reduce your cooling costs by 10 to 15 percent.
Install a ceiling fan. Ceiling fans move the cool air around a room, effectively inducing a "wind chill" type effect. While ceiling fans don't actually lower the temperature in a room, they do cause the people in the room to feel cooler. Remember to turn the fan off when you're not in the room to keep energy bills lower.
Install shades on all windows. There are many types of shades that block heat-inducing solar waves while still letting ambient light in. To maximize cooling efficiency, choose opaque shades or draperies in a dark color.
Replace old windows and doors with new, Energy Star ones. New windows come with low-e glass which is comprised of two panes of glass with argon gas in between. New windows are also available with a low-e glazing that blocks unwanted heat. Open a window just a crack to draw cooled air through the room.
Keep your unit clean. Both the swamp cooler and the duct system should be cleaned regularly to ensure maximum efficiency. Use a multi-purpose household cleaner to clean the unit itself. Hire a professional to clean duct systems.
Change the fiber pads on the unit, following manufacturer's recommendations.
Turn your thermostat up a few degrees. For each degree you turn the thermostat up, you should see a savings of three to five percent on cooling costs.
Hire a technician to inspect the unit. Swamp coolers may need tuning every two to three years to ensure top performance.