Question by 2labs: How can I make a home more energy efficient? We are about to buy a large two story home built in 1900. The furnace is brand new so it is already energy efficient. All new windows as well. What other things can I do save some money? Best answer: Answer by CJJERICHOGo to college and take a energy efficient course that is in the construction and architecture technology cirrculum…..Worked for me. Know better? Leave your own answer in the comments! Tags:Efficient, energy, home, Homes, more ...