With the aid of a fan, the warm air travels through the ducts heating up the whole foundation. The Natural Way of Heating up a House.
Warm air is lighter than cold air and therefore rises.
It is only logical that warm floors provide even comfortable heat in the whole room. An ordinary radiator or baseboard heater gives off a lot of heat which quickly rises to the ceiling. You will have no difficulty in keeping a cool head and warm feet. The slab can also passively absorb energy from the daytime sun and distribute it at night, reducing the amount of purchased energy required. The slab dries out quickly Breeding places for moulds and fungi never occur.