UFH Running cost difference with 6mm verses 10mm insulation board

[Qwerty]

10mm Marmox board

Stage 1- 68.8*c

Stage 2- 63.2*c

Stage 3- 54.3*c

Stage 4- 12.9*c

Stage 5- 5.8*c
Stage 6- 13.0*c

Stage 7- 10.2*c

 

[Qwerty]

6mm Marmox board

Stage 1- 68.4*c

Stage 2- 63.4*c

Stage 3- 48.7*c

Stage 4- 24.6*c

Stage 5- 7.3*c

Stage 6- 9.9*c

Stage 7- 9.4*c

 

[Qwerty]

Conclusions

No science lab standard I know, but it clearly shows that the thicker the insulation boards the better!
The bare floor clearly absorbed a lot of heat rather than reflecting it back which is to be expected. The ply being so dense absorbed more heat and this transferred through it to the underside much more than either of the Marmox boards. The ply also lost its heat much faster.
The Marmox boards performed best. The 10mm board reflected back (and retained) a lot more heat than any of the others. The heat on the top of the Marmox boards could be seen by a circle. This even transferred through to the underside of the 6mm board as well as being visible as "sweating" onto the garage floor!

Out of curiosity I checked a few things 10 minutes later and found the 12mm Marmox retained the heat best (@ 8.7*c) and the 6mm was just 6.5*c.

The floor where the 6mm Marmox had been was still 6.0*c after 10 mins whereas the floor where the 10mm & ply still read 5.8*c!!

I'm continuing to use 10mm boards where I can thanks. It just makes sense! I appreciate that ply retains temperature but my tests also showed it was a massive heat sink and didn't retain it well.

Insulation boards work.....simple as that really.

 

[Ian]

Great post Geoff, even though it's not lab conditions, it still conclusively proves that the thicker the board, the greater the heat retention.

 

[Dan]

Thanks Geoff!
Awesome basic tests there.

 

[Chalker]

Excellent test in the real world.

 

[John Benton]

Great test there Geoff, the hours must fly by in your house :lol:

 

[andy8758]

Thx for doing this experiment Geoff - which tends to support the training we have had on UFH - 10mm insulation board makes a significant difference in reducing time UFH takes to achieve temperature required, and required less energy usage to maintain.

Quality piece of research!

 

[cam_low]

this post gives me the answer to the questions I was about to ask and more than likely get directed to !

Excellent test Geoff. 10/10 mate.

 

[Lee@emctiles]

TBH that was an excellent post Geoff, i think it should be re posted as a thread on its own.