They lay the loops on plasterboard or chipboard, then place gypsum strips between each loop (like a sparse panel) and finish by pouring plaster over the pipes. This creates a solid plasterboard that conducts heat up to the parquet/tiles or whatever you want to use as the top floor. In this way, you can vary how closely you lay the loops and optimize the heat supply, for example, many loops with small gaps near window sections and much sparser further into the room.
That's exactly why I started this thread, is it really a good way to build? Those I know who have installed sheet metal systems are very satisfied, but you shouldn't dismiss something you're not familiar with without investigating it a bit closer.
I like the basic idea of being able to optimize loop density but messing with plaster, very doubtful.
I like the basic idea of being able to optimize loop density but messing with plaster, very doubtful.
I just spoke with Nereus, the Finnish underfloor heating system, we'll probably get the quote this afternoon. Nereus is owned by Upnor, which also owns Wirsbo, interesting, isn't it?
A few years ago, Wirsbo was the dominant underfloor heating supplier in the Finnish market, they had almost 60% of the market. Then, when the Finnish Nereus system was developed, Wirsbo lost its market share in Finland and now has only 18%, while Nereus has captured 55% of the Finnish market in a few years. Why? Well, it's a very efficient system. We'll see what the quote says.
A few years ago, Wirsbo was the dominant underfloor heating supplier in the Finnish market, they had almost 60% of the market. Then, when the Finnish Nereus system was developed, Wirsbo lost its market share in Finland and now has only 18%, while Nereus has captured 55% of the Finnish market in a few years. Why? Well, it's a very efficient system. We'll see what the quote says.
What he explained is that they lay the loops much closer together than with, for example, Wirsbo, and then you get much more even heat without needing the plate. The loops are laid 7 cm apart.
He explained that the purpose of the plate is to distribute the heat.
It seems interesting to investigate, if nothing else, the price.
He explained that the purpose of the plate is to distribute the heat.
It seems interesting to investigate, if nothing else, the price.
On the other hand, this means that a lot more pipe will be needed. And if more pipe is needed, you will need more groups and controls on the manifold, as the pipe can't be endless. With plates, the space between the pipes is 30 cm.Sweli said:
As for reducing the density in the middle of the house... well. I want it warm there too!
I'm also a little curious about how to distribute the pipe. In plates, it's fairly easy; you just step the pipe into the groove as you roll it out. Here, you're supposed to lay it on the floor between strips of drywall that don't hold it in place....? If you've handled a 240-meter coil of pipe, you understand why I'm wondering. It's about as easy to handle as a polar bear - but on the other hand, it's as easy to handle unrolled as an eel... ;D
It would be exciting to hear experiences from someone who has installed the system - it might work brilliantly.
When do you need to nail the floor?
Not when laying parquet.
We have informed them where the walls will stand and where we will need to build studs so that they don't lay pipes just there.
So I don't think there's a significant risk.
Not when laying parquet.
We have informed them where the walls will stand and where we will need to build studs so that they don't lay pipes just there.
So I don't think there's a significant risk.