Installation of underfloor heating in the upper floor hallway area

Have started laying according to the specified installation spacing. There is little room for maneuver and I have also ended up with only a few meters left according to the specified pipe length. Temperatures are listed as 20/24. Supply temperature is indicated as 35 degrees.

Temperatures are listed as 20/24. The flow temperature is specified as 35 degrees.

What a pity...

It could have been done more up-to-date. You won’t achieve 20/24 anyway, as the temperatures equalize. And if the underfloor heating in the bathroom actually reaches 24 degrees, the entire house will be significantly warmer than 20 degrees. So the bathroom is deliberately not properly equipped with underfloor heating but instead uses wall radiators. There is no other way with the planning.

But the house will be warm. That’s undisputed. It could just be better.

You can also combine the dressing room and hallway, then all heating circuits would have roughly the same heating circuit lengths. That would greatly simplify the hydraulic balancing. ERR is, I believe, only mandatory for rooms from 6 sqm onwards. At least that was the case in 2019.

You can simply exempt yourself from that nonsense ERR - Efficiency Reduction Regulation. Hopefully, no buffer storage tank is planned for brine/water heat pump + underfloor heating either.

Is the heating circuit distributor already installed? Otherwise, I would strongly advise against putting it in the bedroom!

Such a thing can cause noises, especially with active control.
It also produces waste heat that you don't want in the bedroom.

Better in the hallway or bathroom.

You can simply have yourself freed from that crap ERR - Efficiency Reduction Regulation. Hopefully, no buffer tank is planned for a brine/water heat pump + underfloor heating either.

No buffer tank

Is the heating circuit distributor already installed? Otherwise, I would strongly advise against putting it in the bedroom! Such a thing can cause noise, especially with active control. It also generates waste heat that you don't want in the bedroom. Better in the hallway or bathroom.

Yes, it's already installed; the heating circuits for the master bedroom, dressing room, children's room 1, and children's room 2 are already connected.

Now to the original question: I think we will route the return flow of the bathroom back through the hallway with a few coils.

Yes, it’s already in place, the heating circuits for the master bedroom, dressing room, children's room 1, and children's room 2 are already connected.

That’s a shame. But I would still consider moving it about 20 cm to the other side of the wall. So into the bathroom.

Now to the original question: I think we will route the return flow of the bathroom with a few snakes through the hallway.

I wouldn’t do that. What speaks against having its own circuit? I would have insulated the supply lines to the individual rooms and then created a separate circuit. If that’s no longer possible, then snake the return a bit from the children’s rooms, but don’t extend the pipe lengths from the bathroom.