Underfloor heating distance to balcony doors

I calculated it ... our living space with 35 sqm should have 3 heating circuits and more than 300m of pipe .... We have 200.

I don't understand this. This is basic craftsman knowledge, right???? How can you do something like this wrong?

If it were only one trade, but we have discovered such a faux pas in almost every one, thank God we have always been able to prevent everything so far ....

All craftsmen are local, recommended. I just keep shaking my head.

The heating circuit must not be longer than 100 meters.

Yes, so 3x 100 m would have been appropriate instead of 3 x 70 m

I measured it once, the distance from the balcony door even amounts to 60 cm and the distance between the pipes is 15 cm instead of the agreed 10 cm

That can have very trivial causes. Too little material in the car, but the order has to be finished quickly ...

Apart from the fact that it should of course be laid as agreed, you cannot simply say all circles are 100m long. It depends much more on the design. Pressure losses, etc.

Thank you all, the entire underfloor heating in the living and dining room has just been newly installed and now everything is good