Information about Central Air Conditioning Units. Central air conditioning units use a lot of energy to keep your home cool and comfortable. They come in a variety of sizes, and size truly does matter with these devices. .

Research The Equipment You Want to Use. Choose a gas boiler that is large enough to heat your home and supply hot water to the sinks and bathtub, yet isn't too large. .

Reduce Heat From Lighting. Lights create a lot of heat which your AC system has to remove. Replace your lights with compact fluorescent (CFL) bulbs, which use 75% less energy and create 70-90% less heat at the same time. Regular lights give off 10% light and 90% heat, while CFL's give off 90% light and 10% heat. .

Install Reflective Film on Windows. The windows let lots of heat into your home, because they're not nearly as insulated as your walls (if at all). .

Install a White Roof. When you replace your roof, metal is best. If you don't go with metal, then at least go with white. A white roof typically saves 10%, and up to 20% on cooling costs. .

Install a Metal Roof. Metal roofs reflect much more heat away from your home than do regular asphalt shingle roofs. .