Which statement correctly describes typical pre-made rolls of electric radiant flexible sheet underfloor heating?

• A. They must be installed within 100 mm of pipe work.
• B. They are typically 500 mm wide and 2–9 m long, rated 100–200 W/m², with heating cables attached to adhesive fibre glass.
• C. The circuit is not protected by an RCD.
• D. They should be installed under baths and toilets.

Answer: (B)