ᐅ The children's bedroom is too warm in the new build.

Created on: 1 Nov 2019 21:59

AD1988

Hello everyone,

We have finally been living in our newly built house for two weeks now. We have underfloor heating throughout the entire house and a digital thermostat in every room. All thermostats are set to 21 degrees Celsius (70°F) throughout the house, and everything works fine overall. As soon as the thermostats reach 22 degrees Celsius (72°F), they switch off—except in the children’s room. There, we have noticed that the temperature easily rises to 23 degrees Celsius (73°F) overnight, and the floor remains constantly warm compared to the other rooms.

I have already contacted the company that installed everything for us, but it will probably take some time before I receive a response. As a curious person, I would really like to understand what could be causing this or what the reason might be.

Best regards

AD198812 Nov 2019 18:36

#55

Now I would like the professionals to take a look at this. Either I have no idea what I’m doing, or everything is simply wrong. Attached are the calculation I found and a photo showing the current situation on the ground floor when all circuits are open.

Hydraulic manifold with red valves; labels: supply line, hallway, bathroom 1.

Manifold pipe with valves; labeled lines: hallway, office 1, living room 1, kitchen 1, bathroom 1

Technical datasheet with measurements: tables, values for temperatures, pressures, and distribution.

HilfeHilfe13 Nov 2019 06:27

#56

Should I call a plumber?

Joedreck13 Nov 2019 07:17

#57

I see that a supply temperature of 40 degrees Celsius (104 degrees Fahrenheit) was used, and the toilet is being severely throttled as a result. Follow the hydraulic balancing process. Lower the supply temperature as much as possible! Open as many circuits as possible.

guckuck213 Nov 2019 07:20

#58

If a system is designed for 40 degrees Celsius (104°F), it will save piping, meaning the pipe spacing can be relatively wide. Is anyone able to calculate this backwards or does anyone know approximately how much pipe per square meter corresponds to which pipe spacing?

Requests to reduce the supply temperature are suddenly limited when pipes have been installed everywhere at only 20 or 25 centimeters (8 or 10 inches) spacing.

Joedreck13 Nov 2019 07:27

#59

Here the question is theory versus practice. I wouldn’t calculate anymore, just do it. Always keep a record before and after.
Theoretical considerations won’t help here.

matte13 Nov 2019 07:54

#60

For this, you would need the area of each room. Then you could already estimate the VA...

€: For VA 15cm (6 inches), about 5.8m/m² (meters per square meter) are needed; for VA 10cm (4 inches), it is already 8.8m/m². This is, of course, only approximate but should be enough to estimate the VA.

ᐅ The children's bedroom is too warm in the new build.

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