Low cost improvements

Replace lamps and light bulbs with low wattage, fluorescent

fixtures; they use a quarter of the energy that normal incandescent

lighting does.

Install motion sensors, dimmer switches, and timers

wherever it’s possible.

Make sure all areas that might let air leak in or out are caulked

effectively to reduce draughts.

Substitute energy-saving showerheads in your bathroom; this reduces

water heating costs very much.

Install ceiling fans in every room to help keep things cool.