This is where underfloor heating is fitted between the wooden joist without raising the floor height, these systems can also be used with battened floor to maintain a low build height.
Underfloor Heating on Suspended Wooden Floor Joists
Komfort 220 System For properties which requires the floor to form a structure to the building.
Komfort 110 System Aluminium spreader plate system which is light weight and will not raise the floor height.
Komfort 205 System This system is and alternative to the Komfort 110 system with spreader plates.