Hello everyone.
We have an air-to-water heat pump, a mechanical heat recovery ventilation system, and underfloor heating.
I made a few adjustments to the heating system.
Among others:
- Disconnected the ERR and adjusted the heating optimally.
- Set the heating curve from 4 to 2 (maximum 10).
- Lowered the flow temperature from +40 to 32 degrees Celsius (89°F to 90°F).
After completing these changes, the temperature in all rooms was reasonably comfortable. I then only reduced the flow in the bedroom, increased it in the home office since we suddenly had to work from home, and also raised it slightly in the guest bathroom.
What do you think of this approach in general? Is there anything else that could be optimized?
Now my main question:
After six months, my girlfriend feels the house is generally too cold, although the temperatures remain steady. I think this is mostly psychological due to the weather outside. However, since we are expecting weather starting tomorrow that occurs only about once every ten years here, I want to increase the heating slightly throughout the entire house. How should I best proceed?
We have an air-to-water heat pump, a mechanical heat recovery ventilation system, and underfloor heating.
I made a few adjustments to the heating system.
Among others:
- Disconnected the ERR and adjusted the heating optimally.
- Set the heating curve from 4 to 2 (maximum 10).
- Lowered the flow temperature from +40 to 32 degrees Celsius (89°F to 90°F).
After completing these changes, the temperature in all rooms was reasonably comfortable. I then only reduced the flow in the bedroom, increased it in the home office since we suddenly had to work from home, and also raised it slightly in the guest bathroom.
What do you think of this approach in general? Is there anything else that could be optimized?
Now my main question:
After six months, my girlfriend feels the house is generally too cold, although the temperatures remain steady. I think this is mostly psychological due to the weather outside. However, since we are expecting weather starting tomorrow that occurs only about once every ten years here, I want to increase the heating slightly throughout the entire house. How should I best proceed?
bauenmk20205 Feb 2021 12:41Pump set to constant or variable speed?
If your system balances out so that heat output equals heat input (at -5°C (23°F), 0°C (32°F), 15°C (59°F), etc.), you can adjust the temperature by offsetting the curve (in our controller, this is listed under "Temperature Value x"; you can increase or decrease x in steps).
For example, heating curve 2; temperature +2.
If your partner feels cold, try measuring the wall temperatures with an IR thermometer. We built with a monolithic structure, so the wall temperatures are lower compared to insulated wall construction. Since this is "radiant heat," it can have a stronger impact on comfort than the actual air temperature in the room.
I am currently optimizing as well. My pump is still running at 100%, and the temperatures all seem fine except for the bedroom, which is still at 20°C (68°F) even though the doors are closed and the flow rate is set to 0.5 liters per minute (0.13 gallons per minute).
If your system balances out so that heat output equals heat input (at -5°C (23°F), 0°C (32°F), 15°C (59°F), etc.), you can adjust the temperature by offsetting the curve (in our controller, this is listed under "Temperature Value x"; you can increase or decrease x in steps).
For example, heating curve 2; temperature +2.
If your partner feels cold, try measuring the wall temperatures with an IR thermometer. We built with a monolithic structure, so the wall temperatures are lower compared to insulated wall construction. Since this is "radiant heat," it can have a stronger impact on comfort than the actual air temperature in the room.
I am currently optimizing as well. My pump is still running at 100%, and the temperatures all seem fine except for the bedroom, which is still at 20°C (68°F) even though the doors are closed and the flow rate is set to 0.5 liters per minute (0.13 gallons per minute).
Tx-25 schrieb:
To the best of my knowledge, I have set the heating to its minimum output. However, it should still provide the indoor temperatures we aimed for, and it does. @nordanney, you seem to remember our previous conversation or maybe you had a look 😉
I have to agree with my girlfriend that it could be a bit warmer. I’m not cold, and she rarely is, but it’s not exactly cozy.
Now, regarding your question why: I expect the house to get somewhat colder at -13°C (9°F) with strong gusts of wind because I’ve turned down the heat pump a bit. I also disconnected the ERR, which would otherwise ramp up the system to full power.
Or does everything adjust automatically?
If I still want it warmer everywhere (considering the weather forecast for next week), which settings should I change?
@T_im_Norden: What information do you need? KFW 40 insulation for the building envelope, 150 sqm (1615 sq ft), single-family home, 1.5 stories, Elco Aerotop Split air-to-water heat pump.What kind of nonsense are you coming up with? Why 18°C (64°F)? Just set the heating properly so that it’s at least 21 to 22°C (70 to 72°F) everywhere. As your better half, I could tell you a thing or two!Bookstar schrieb:
What kind of nonsense are you putting together? Why 18 degrees? Just set the heating properly so that it’s at least 21 to 22 degrees everywhere. I would know better, as your better half! We had the right temperature everywhere. 18 degrees Celsius (64°F) in the bedroom, 20 degrees Celsius (68°F) in other rooms, and 21 degrees Celsius (70°F) in the living room, bathrooms, and office.
With the current outside temperature of -16 degrees Celsius (3°F), the house is too cold. Raising the heating curve from 0.2 to 0.3 has not helped yet (after 24 hours).
I noticed that the heating system always shows a lower outside temperature. The thermometer is mounted on the garage (unheated and on the north side). Is it generally possible to adjust an offset of a few degrees here?
apokolok schrieb:
Haha, cool.
Just turning it into a science when you want the house to be 1.5°C (2.7°F) warmer.
Welcome to the new world. With my question, I didn’t just want to raise the temperature, but also wanted to have my settings reviewed by you. I have done a lot of research (which is why I carried out the hydraulic balancing in the first place), but ultimately I still don’t know enough about the subject. The manuals from Elco are terrible. They only include two sentences without any explanation of the reasons or background. Therefore, I can hardly draw any conclusions from them.
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