RetroFit Multi Zone Low Profile Wet Underfloor Heating Kit 60m²Retro Fit 60m Low Profile Multi Zone Water Underfloor Heating Kit Soleheat are delighted to offerour low profile panels to make underfloor heating installation that much easier. Simply install the kit and fit your tiles or flooring directly on top with the lower profile 12mm piping. Due to the low profile nature of the system it can be installed only using a 15mm depth which gives significant flexibility over the traditional underfloor heating