Manifold cabinet for underfloor heating in external wall?

[one-]

As the title reads, "dare" I place a distribution cabinet for underfloor heating in an outer wall? The wall consists of 12 cm brick and 25 cm concrete block. If I recess the cabinet, I will have 12 cm brick and 10 cm concrete block behind the distribution cabinet. If the heating is functioning, it shouldn't be a problem, but what happens during a longer power outage if it's below freezing outside?

It would clearly be the simplest placement, but maybe it's foolish? What do you say?

 

[jojo123]

Not much happening in your neck of the woods, it would be different if it were in Jokasjärvi with -40, and such long interruptions aren't the case, if you want you can rout a few more centimeters and place an insulation board behind, preferably about 5-10 cm out on the sides of the cabinet.

 

[one-]

Not much happening in your area, it would be different if it was in Jokasjärvi with -40, and the interruptions aren't that long, if you want you can carve out a few more centimeters and place an insulation board behind, preferably about 5-10 cm on the sides of the cabinet

Then it's maybe more about whether the wall's stability is affected if you create a "hole" of 700x500x150 + possible space for insulation??

 

[jojo123]

You said brick+hollow block, which side is the brick on

 

[one-]

The brick is outermost, thus brick facade

 

[jojo123]

The brick 12 cm has no impact, it stays where it is, the hollow stone, it leaves 10 cm on it, how will the cutout be between two courses or will it be half a stone up?

 

[one-]

The brick 12 cm no impact it stays where it is, the perforated brick, there will be 10 cm left on it, how will the recess be
between two courses or will it be half a brick up

I don't quite understand what you mean by your question?

 

[jojo123]

The hole stones, how tall are they, do you know that, they range from 15 - 40 cm, and at what height do you want to start
Between the stones, there is mortar, will there be whole stones at the bottom or will you chisel out a piece there.

 

[one-]

Hålstenen how tall are they do you know, available from 15 - 40 cm, and at what height do you want to start
Between the stones, there is mortar, will there be whole stones at the bottom or will you chisel out a piece there.

Haven't knocked off the plaster yet so I'm not quite sure how it looks behind that spot... will investigate it tomorrow and upload a picture I think the stones are 15 cm tall, but can't say for sure...
But the wall at the particular spot is thicker than the other walls; they've added about 9 cm. I assume they've done it because the walls here are above ground level, maybe to insulate better? The other walls are below ground level. Split-level house.

 

[jojo123]

Knock it open and see how it looks, and where the stone starts at the height you want to use and come back.

 

[one-]

Knock it open and see how it looks, and at what height the stone starts that you want to use, and come back

No time for any “tinkering” today, but snapped a couple of pictures anyway.


Here in the mess, you can see that the wall is “extended”.


Here is where I have planned the distribution cabinet. Don’t know how I held the camera, looks crooked and tilted in all directions

 

[KjellTimell]

Is that the long side of the house as I interpret it? Then the intermediate floor is likely to span that way = the wall is a load-bearing structural element. It wouldn't be entirely unproblematic to make a hole in it without ensuring the load is transferred correctly.

I'm not a structural engineer, so don't take my word for it, but my understanding of it:
The windows should reasonably have a beam or support above. If you're going to inset something, you should do it directly underneath and centered on a window, and not make a hole wider than window width-150-150.
That is, if the window is 1000mm wide, you make a hole a maximum of 700mm wide with a 150mm offset from right/left.
You definitely should consult with a structural engineer before cutting into the wall.. @justusandersson usually knows about this stuff, let's hope he finds this thread.

I’m facing a similar situation myself; however, I’ve decided to build up 90mm Leca from the inside against the existing outer wall and embed the distribution cabinet and chase all the water and electric pipes into this instead.
No impact on the load-bearing of the outer wall and you get some insulation in the bargain.

 

[one-]

Thanks for the response @KjellTimell
It's not the long side of the house but the short side. I'm not sure about making such a hole myself, but I imagine it shouldn't matter to make an incision in the part that is "built up." That way, I'll at least partially fit in the distribution cabinet it will end up in a section that becomes a vestibule.

 

[jojo123]

It is the marked area that the cabinet will fit into, how deep does it go into the stones?

 

[one-]

It is the marked area that the cabinet is going into, how deep does it go into the stones

The cabinet is about 15cm deep...