National home energy rating is a score that tells you how efficient your home's energy use is. It's like getting a grade from the government on how much energy your home uses. The number is on a scale of 1 to 10, with 1 being the worst and 10 being the best. A higher number means your home uses less energy, saving you money on your energy bills. To get the score, someone from the government will look at things like your insulation, windows, and other energy-saving features in your home.