underfloor heating efficiency vs pipe size and centres

15 Jul 2018
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United Kingdom
Hi all,

I'm looking at a retrofit UFH system with overlay boards for the ground floor above floorboards.

I have been quoted various options including 16mm pipe in 25mm boards vs 12mm pipe in 18mm boards.

Just wondering what your experiences are with either system for heat output and efficiency.

The floor will be insulated between joists withwith 80mm Celotex.

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