Why bother with cost efficiency? You can afford the bills so why bother? Many people will be shocked to learn that they can lose up to 25% or more of the energy in their home without the need to. You literally could be flushing your money down the drain. The good news is that making your home energy efficient does not have to be overly challenging. It also does not have to be overly costly either. There are some changes that will cost a decent amount of money to implement into a home.