ᐅ House too warm, underfloor heating controller set to 1.

Created on: 31 Oct 2017 06:41
B
Barossi
Hello,

the first four months of "living" in our new home are over. We are very happy to have chosen a ventilation system (Zehnder 450). Our house has a living area of 240 m² (2,583 sq ft) and is heated with gas (Buderus Logamax plus), and there is a solar thermal system for hot water. Additionally, we have a tiled stove in the living room.

I turned on the heating exactly four weeks ago and have been tracking the gas consumption. During this time, 125 m³ (4,413 cu ft) of gas was used. October was rather warm. The rooms tend to be too warm (23°C / 73°F), even though the thermostats for the underfloor heating are all set to the lowest setting (level 1).

The desire to make it "cozy" with the tiled stove just doesn’t arise.

What could be going wrong here?

Best regards,
Barossi
J
Joedreck
31 Oct 2017 21:07
Turn all the controls up. Only then can you tell if the heating curve can be lowered further. Unless you want to be very flexible with the room temperature, which you can do already. If it stays too warm, you can turn it down further.
77.willo31 Oct 2017 23:53
Joedreck schrieb:
.

Fine tuning is a matter of personal preference. The main goal of the heating system is "to keep the place warm."

And don’t get frustrated too quickly. It can easily take the entire winter to get it just right.

But then, at maximum efficiency, you have the best possible comfort at home.

I don’t quite understand the point. Why should someone keep adjusting the heating all winter? What is the goal?

"To keep it warm" seems like a reasonable goal when setting up a heating system, or does it have other functions?
J
Joedreck
1 Nov 2017 00:13
The main goal of keeping warm can be achieved in various ways. The method I described outlines an efficient, meaning economical, approach that ultimately provides maximum comfort, as you will no longer need to adjust any controls or settings.
B
Barossi
1 Nov 2017 06:03
Joedreck schrieb:
Turn all the controllers up. That’s the only way to see if the heating curve can be lowered further. Unless you want to be very flexible with the room temperature… You can do this now. If it stays too warm, you can adjust it down.

Hi Joe,

I have set all the room temperature regulators (RTR) to 3 (mid position) and am monitoring the room temperatures. My goal is around 20°C (68°F), and I will then adjust the heating curve using the “matching” method, right?

We have quick flexibility with the tiled stove.

Best regards, Barossi
J
Joedreck
1 Nov 2017 11:49
Set all the controllers to the maximum. Otherwise, they will shut off once the temperature reaches level 3. If you have 22°C (72°F) at full power, you can lower it gradually.
Do this until a room no longer reaches your target 20°C (68°F). Then turn it up a little again.
The offset is especially important during transitional seasons. As far as I know, this is called parallel shift in this context.
You might want to create a table showing which flow temperature is needed at different outside temperatures to achieve the desired room temperature.
It's a bit tricky.
B
Barossi
1 Nov 2017 12:54
Hello Joe,
I will start to gradually work on it, fully aware that it will always take quite some time. It gets extremely challenging when the tiled stove is used again in the evening.

Best regards, Barossi