Other well-known electricity guzzlers in South African homes are electric hobs and ovens.
"Insulation is far and away the most cost-effective way to green your home," says Clarke.
Something else that is often overlooked in terms of insulation, is the fireplace. You lose a huge amount of heat through your chimney if there's nothing to slow airflow when it's not in use. Always make sure the damper is closed when you don't have a fire lit, and consider investing in a chimney balloon to prevent drafts even more effectively.