ᐅ What installation spacing should be used for radiant floor cooling?

SandyBlack schrieb:

It’s not very ambitious. Our general contractor plans everything for 35 degrees. With additional costs in the four-digit range, it’s not financially worthwhile to go down to 30 degrees.
My main concern is the cooling function, and whether the 15 cm (6 inches) pipe spacing could cause problems.

For heating, a pipe spacing of 10 or 11 cm (4 or 4.3 inches) is better than 15 cm (6 inches). Underfloor heating is designed based on heating requirements, not cooling. However, a closer pipe spacing is naturally more advantageous for cooling as well.

Are you getting an air-to-water heat pump or a ground-source heat pump?

I’m happy to share the plans. As mentioned, I am aware that the design is not optimal.
The technical room and storage areas should actually be heated as well, but our general contractor simply doesn’t do that.
At least we managed to convince him to install underfloor heating beneath the bathtub.

As I said, my main concern now is about cooling and whether this setup will work.

We have an air-to-water heat pump.

Once again... If the underfloor heating is properly sized for heating, then cooling will not be a problem either.
Your underfloor heating design still has a lot of room for improvement. It can definitely be done better. This way, you will only get a mediocre underfloor heating and cooling system.

SandyBlack schrieb:

I’m curious if any of you use underfloor heating with a cooling function and have pipe spacing greater than 10cm (5 inches).

SandyBlack schrieb:

My main concern now, as mentioned, is about the cooling—whether it can actually work.
We have an air-to-water heat pump.

Hausbau55EE schrieb:

Underfloor heating is designed for heating, not cooling. However, closer pipe spacing is naturally better for cooling as well.

The "construction" shown in the plans seems to me like a ridiculous stunt or a prank close to the Flat Earth Theory *LOL*
I would never, ever, under any circumstances think of using two separate systems/piping networks to regulate ONE parameter!!! (In that sense, the idea of two different pipe spacings seems twisted and as an overlay system can only be designed by dedicated M.C. Escher experts, as a perfect and alarming example of a Pisa test failure). Kelvin and his peers must be spinning in their graves at the thought of such concepts. @Nordlys is sorely missed here!

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What do you think are the disastrous consequences of the design? Besides the higher supply temperature and resulting lower efficiency?

@Hausbau55EE As I said, I am aware of that. It is nowhere near Flow30. However, investment costs must also be factored into the calculation. A heating system that is 10% more efficient doesn’t benefit me if it causes additional installation costs in the mid four-digit range.