ᐅ Underfloor Heating Control

Created on: 29 Sep 2016 11:08
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kernm23
I have an air source heat pump heating system with a ventilation unit (Alpha Innotec KHZ 80) and manual room controllers in my new build.
What is the best way to control the temperature? During commissioning, I was advised to turn one room controller all the way up and set the others to the middle position. Then I should adjust the temperature by changing the heating curve up or down.

What should I do in rooms where I prefer it cooler or unheated (technical room, storage room, bedroom)? Should I turn the room controllers all the way down there?
Will the temperature be the same during the day and at night? According to commissioning, a nighttime setback is not recommended (due to inefficiency). How can I then keep bedrooms and children’s rooms cool at night?
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oleda222
7 Oct 2016 07:42
Hopefully, you are not expecting miracles regarding different room temperatures. A modern house is so well insulated that heat (hopefully) stays inside the building. On the other hand, an interior door mainly provides visual privacy; its insulating properties are very limited, and this often also applies to interior walls.

Under these circumstances, how do you plan to prevent heating in unheated rooms? What this achieves is warming the building volume through a smaller heat exchange surface (underfloor heating), which requires a higher supply temperature and leads to increased energy costs.

Temperature differences of 2-3 degrees Celsius (3.6-5.4 degrees Fahrenheit) are possible in a new house based on my experience, provided the doors remain closed.

For this reason, it is often recommended to avoid individual room control. Underfloor heating is too slow for quick adjustments anyway, and slight temperature differences are managed by regulating the flow rate.
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toxicmolotof
7 Oct 2016 08:31
oleda222 schrieb:

That’s why it is often recommended to do without individual room controls,
...And in my opinion, this then violates the energy saving regulations and consequently the requirements of the KFW.

Better to install the cheapest thermostats and just remember two settings: On and Off.
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Legurit
7 Oct 2016 08:50
Toxi, are you sure?
For example, the body states, "Due to the 'self-regulating effect' of surface heating systems with low system and surface temperatures, the energy saving regulation can be considered fulfilled if a central outdoor temperature-controlled system with a timer is installed."
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oleda222
7 Oct 2016 09:14
It is also possible to be exempted from the requirement to install individual room controls.
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Legurit
7 Oct 2016 09:15
*Bosy naturally
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toxicmolotof
7 Oct 2016 10:50
According to Paragraph 14 of the Energy Saving Ordinance, all central heating systems must be controlled based on outdoor temperature and time.

However, I do not see any exception for underfloor heating, unless the rooms are smaller than 6 square meters (65 square feet). Individual room control must be possible.