Width of wooden flooring with underfloor heating

[CarlOscar]

Just want to respond to Frasse who says that floorboards SHOULD be grooved on the underside.
The reason for grooving the boards on the underside is that poor quality wood is used, which is cut incorrectly!
If you use dense and straight-grained wood and make sure to have the heartwood side facing up and the growth rings "standing," you avoid these problems. But of course, the building supply stores that only want to make dollars don't care about that!

 

[KarlXII]

The energy is constant. If energy is added, it must go somewhere. In a floor, it can go upwards or downwards. The more resistant it is on the top side, the more heat you might think migrates downward instead, warming the entire construction. But the heat is always there.

In other words, you should be able to compensate for a resistant system on the top side by making it even more resistant downwards. In other words, insulate more. Theoretically, you could lay thick polystyrene on the floor and still have functioning underfloor heating, it's just a matter of the supply temperature.

You might think so. But now it's about getting out the heat as well. Redo your thought experiment with 100 mm of foam plastic on the topside instead of wood and 200 mm on the underside...

The rule is a maximum of 30 mm of wood above the plates, otherwise, you won't get the right heat output.

 

[gaia]

... and the result is that the flow temperature of the water does not differ much from the return in a floor loop. That's usually how it works when it is well insulated. gaia

 

[byggimpert]

... and the result is that the forward temperature of the water does not differ much from the return in a floor loop. That's usually how it works when it's well insulated.
gaia

Probably an extremely dumb question, but if the forward temperature and the return water temperature don't differ significantly, does it still get warm in the room?? How much does it usually/should it differ or should there be no difference at all ???
//Christina.

 

[MathiasS]

Probably an extremely stupid question, but if the supply temperature and return water temperature do not differ significantly, will the room be warm?? How much should it usually differ or should it not differ at all ???
// Christina.

That's correct. If the temperature is exactly the same, no energy has been released. We might benefit from the friction heat that occurs when the water flows in the pipes, but that's not very much... ;D

How much it differs depends, among other things, on the flow (the speed of the circulation pump) and the surrounding air temperature. At the moment, it differs by about 4.5 degrees in the underfloor heating loop in our kitchen.

 

[betula]

It is possible to lay very wide planks if you screw them down on one side and find wide gaps between the boards acceptable in winter.
The grooves on the underside are mainly to ensure the plane goes straight and that the planing mill can sell the shavings as energy instead Flooring made from properly dried wood does not need grooves on the underside, but it will still shrink and swell in width.