On central air conditioning in residential quarters

The one you mentioned is called ground source heat pump. In fact, the air conditioner in the user's home doesn't use much electricity, about 30w, which is much better than a light bulb. But the power of the main engine is high, so the cost of air conditioning is high. There is generally nothing to pay attention to in winter, but in summer, we must pay attention to condensed water and clean the return air filter frequently. You can also ask about your property. I won't go into details.