Many improvements in domestic energy efficiency have occurred in the past decade. Today's average new home uses one half the fuels required in a house built in 1974, but much more can be done. Household energy losses can be reduced by one half to three fourths through better insulation, double or triple glazing of windows, thermally efficient curtains or window coverings, and by sealing cracks and loose joints.
Reducing air infiltration is usually the cheapest, quickest, and most effective way of saving energy because it is the largest source of losses in a typical house. It doesn't take much skill or investment to caulk around doors, window, foundation joints, electrical outlets, and other sources of air leakage.
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