The basement can also be used as a study. If the basement window is small, you can do sinking space outside to increase lighting, but the cost is high. The quality of the windows in the basement is very high, because the underground space is most afraid of water, so it is very important to seal and waterproof the windows. Poor quality windows, eroded by sunlight and rain, will be bad for living space. The basement is grounded in summer and is very cool. But it is very cold in winter. When heating, the number of radiators must be more than the above-ground space, and heating is stronger than the above-ground space. If you use air conditioning, the power is higher than the same space on the ground.