You are right, but the cooling does not work by cooling and removing water from the air like a normal airco does... It uses the same floor heating circuit as is used for heating, but instead of with heating, when water of about 28-30 °C flows through the circuit, with cooling the water temp drops to about 18°C (no less because then condensation starts appearing on the floor). This works wonderfully well and uses almost no energy since the source temperature of the water is about 10°C to begin with. This system works even better than airco does IMO because it does not make the air dry and it uses alot less energy. The only downside is that is does not work instantly, it takes a couple of hours before it kicks in (but this is no problem because of the insulation).