Originally Posted by micko

I am interested to know why copper will give a false reading, on what do you base this?

it has to do with the sensor touching metal causing it to misread

Originally Posted by micko

I am interested to know why copper will give a false reading, on what do you base this?

Sorry Micko, I cant give you the science behind this, but Im sure that somebody from R&D at Warmup or Elektra or any other UFH company will give you the boffin answer
I just know that it shouldnt be done.......... a bit like I know not to put treacle in my car engine!

With a metal tube, the metal will retain the surrounding heat longer within its body and so give a false reading longer.
The plastic - pvc tubing will not inpact on the readings in any way, and so will be true.

Go to the pound shop, you can usually buy cable tidier's for use with computers that can be used as conduit.

Originally Posted by Uheat - Keith

With a metal tube, the metal will retain the surrounding heat longer within its body and so give a false reading longer.
The plastic - pvc tubing will not inpact on the readings in any way, and so will be true.

I would think copper being a better conductor of heat than plastic would give a more accurate reading as it would heat up and cool down at almost the same speed as the floor. As for plastic it is a better insulator so would react more slowly to temperature change. But I will bow to the grater consensus and next time use plastic because as ever I may be talking rubbish.