ᐅ Duct embedded in screed

Created on: 5 Jan 2015 21:21
H
HardyHard
Hello everyone,
we have decided to install a slot ventilation system in the kitchen and need a flat duct for it.
The duct has the following dimensions: 220/90 mm (9/4 inches) with a length of 1800 mm (71 inches) (1000 mm (39 inches) under the kitchen island and 800 mm (31 inches) under the tiles) and is to be installed on the raw subfloor.
The floor construction above this is 15 cm (6 inches) thick, including tiles (underfloor heating).
The architect has now told me that this would only be possible if the height of the duct were 55 mm (2 inches) instead of 90 mm (4 inches).
Is this statement correct, and do we have to accept it?
Regards and thanks
S
Seaman
6 Jan 2015 22:32
When insulating, one important aspect is to prevent the concrete from damaging the pipes, which can cause pitting corrosion inside them. This issue becomes even more severe if condensation forms on the pipes.

Another important point is protecting cold water pipes from heating up when underfloor heating is installed, because bacteria (Legionella, enterococci, E. coli, and others) thrive at temperatures of 20-25°C (68-77°F) and above.

For hot water pipes, insulation mainly serves to save energy.