There are different types of underfloor heating: referred to as 'wet' and 'electric'.
'Wet' is the installation of water pipes in the floor through which warm water circulates. This is the type of underfloor heating that Geothermique Limited install.
Warm air rises and so the whole of the space is heated.
It is a very efficient method of heating as it utilises low flow temperatures and therefore perfectly compliments heat pumps.