billy asked sheldon to prove that zero exists, and when he tried he kept contradicting his own statements. so he went to two of his professors, and they ended up realizing they couldn’t prove it either
This system is called the “Canadian well.”
The essence is very simple: at a depth of 2-3 meters, the earth always holds a stable temperature of about +10... +15°C.
In the winter, the cold air from the street goes through an underground pipe and heats up before entering the house.
☀️ In the summer, the hot air is cooled down in the same pipe.
That is, the earth functions as both a natural conditioner and a heater.
It does not replace heating or air conditioning completely, but it greatly reduces costs and makes the air in the house more comfortable 👍