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A serpentine line covering a floor area.
Also known as: Floor heating loop symbol, Radiant floor symbol
On a building services plan underfloor heating is drawn as a serpentine line covering the floor area it serves, representing the pipe or cable loop laid within the floor.
Denotes heating embedded in the floor construction, distributed across the area it serves.
Contexts: Technical drawing
Covers an area where a radiator occupies a point, which is why the two are drawn so differently on the same plan.
Contexts: Technical drawing
A continuous line running back and forth in close parallel passes to cover the whole floor area of the room.
A fuller structured visual breakdown is not yet documented for this symbol.