Electric underfloor heating disaster

[robinbanks]

Indeed and leaving it on 24/7 instead of say 8 hours a day for a radiator means you are paying 12 times as much.

Mmm, I don't think you understand it at all

We fitted electric underfloor heating in mothers wet room, good job also had a towel rail on central heating, it was so slow to heat up, turn on to tiles feeling warm 1 hour, as to room getting warm, the extractor fan resulted in never warmer than hall where the replacement air came from.

And loads of insulation, 9 inches.

Sounds like your insulation was in the wrong place, but the entirety of the first paragraph there indicates the room was incorrectly designed with regards to heating

 

[ericmark]

The greater the mass the longer it takes to heat and cool, using a fan as with off peak can control output from the heated mass, and with kick space heaters in kitchens one can reduce space needed for the heaters, and unless one can modulate the output some amount of mass can reduce the hysteresis. As with oil filled radiators.

There is a thought that using underfloor heating with a heat pump means less temperature differential, however heating at floor level is good, but cooling is not, so with a heat pump really want a fan so it can both heat and cool, so even with a heat pump unless in the highlands of Scotland where you never need to cool the home, underfloor even with a heat pump not much good. You don't want one heat pump to cool and another to heat.

In old peoples homes maybe underfloor heating is good, but its use is very limited.

 

[ishaqmir]

Want to thank everyone for all their help and detailed explanations. Have decided to just leave it alone and keep it on a constant temp and bump it up whenever needed, just like an in-screed system. Have trialled it in the bathroom today as it’s only a 300w mat as opposed to 3.5kw lol and so far it’s working well…