www.iwarm.comSpooled Underfloor Heating Kit3411. AppendixChoice of Heating SectionTo chose your section it is necessary to know yourheated area* and rated maximum current in your electricgrid. Specifications for I-WARM heating sections and layout parameters for the heating cable are given in the tableon page 35.Temperature Compensating JointsWhen heating sections shall pass through a temperature compensating joint of the building, to avoid damages to the sections they shall be put in bent pieces ofsteel pipes filled with sand.* Cable layout area without walls, furniture and other heating equipmentspacing.1 — subfloor (slab)2 — functional joint3 — heatinsulation4 — heating section5 — bent steel pipes filled withsand