One barrier to improved residential efficiency has been that appliance energy costs are a small sum in household budgets, resulting in lack of incentive by consumers to investigate the often complicated question of energy efficiency.
提高住宅效率的一个障碍是应用能源费用在住户的预算中所占数额很少，从而使消费者缺少调查经常是复杂的能源效率问题的积极性。