As running Aircons is expensive. Has anyone thought of of converting an underfloor heating system to underfloor cooling, without the heating, but utilising the pumping system with "glycol" and a chiller. The way this would ideally be installed, is fitting it to the upstairs floor of a house. Based on the principle that hot air rises and cool air falls. As underfloor heating is cheaper to run than other heat systems. Theoretically cooling would be cheaper to run than an Aircon. The system would be effective on both upper and lower floors. I have approached a rep of one of these companies in the UK and he thought the adaptation was feasable. The basic cost of a heating floor overlay system is about £800 to £1500 for an average house, excluding labour costs, as it is easy to do it DIY. I have previously done my own heating in the UK. Does anyone foresee any problems with this?