Hello!
I'll start.
Heated area 200m2 (2,153 sq ft)
KfW 55 standard
Mechanical ventilation with heat recovery
Current outdoor temperature 6°C (43°F)
Heating energy consumption including hot water 35 kWh
Electricity consumption 9 kWh
COP 3.88
I'll start.
Heated area 200m2 (2,153 sq ft)
KfW 55 standard
Mechanical ventilation with heat recovery
Current outdoor temperature 6°C (43°F)
Heating energy consumption including hot water 35 kWh
Electricity consumption 9 kWh
COP 3.88
T
T_im_Norden26 Jan 2021 13:21Exactly.
The only question is whether you want to spend the money for retrofitting.
Ceiling penetrations, making everything properly airtight...
The only question is whether you want to spend the money for retrofitting.
Ceiling penetrations, making everything properly airtight...
Well, your house is airtight. Where is the humidity in the bathroom supposed to go? If you don’t open windows and doors, it won’t go away.
Of course, I can’t say anything about the air quality in your house, but if you ventilate regularly, it should be fine. Some form of air exchange needs to take place, either manually or automatically.
Of course, I can’t say anything about the air quality in your house, but if you ventilate regularly, it should be fine. Some form of air exchange needs to take place, either manually or automatically.
A
Alessandro26 Jan 2021 13:31Yes, that's correct @face26, after ventilating for 5-10 minutes three times, the humidity in the bathroom still settles around 60%.
And only in the bathroom.
When I close the door, after a few hours it smells musty, like damp towels.
All other rooms have humidity levels between 40-50% and very good air quality!
And only in the bathroom.
When I close the door, after a few hours it smells musty, like damp towels.
All other rooms have humidity levels between 40-50% and very good air quality!
Alessandro schrieb:
Yes, that's right @face26, even after three times 5-10 minutes of rapid ventilation, the humidity in the bathroom always settles again around 60%.
And only in the bathroom.
If I close the door, after a few hours it smells like musty, damp towels.
All other rooms have humidity levels between 40-50% and very good air quality!Are you ventilating by just opening the bathroom window, or by creating a cross breeze through opening other windows on the upper floor?After 10 minutes of ventilation, the difference in humidity should be more than just 2K (2°C / 3.6°F).
Given the current temperatures, it is also quite surprising that your modulating heat pump is not running continuously, especially considering the 3K (3°C / 5.4°F) hysteresis typical for older buildings.
A
Alessandro26 Jan 2021 14:20The bathroom window is open, so there is no cross ventilation. Depending on the outside temperature, I ventilate for 5 to 10 minutes. But usually, 5 minutes are enough to remove the moisture from the windowpane.
The heat pump basically runs continuously. The heating cycle is only interrupted by domestic hot water production.
Most heat pumps have problems with short cycling during the transition period due to their high output. That is why I set the hysteresis to 3K (at 18°C / 64°F) and 2K (at -15°C / 5°F).
So far, I think the result is quite good with the ERR activated.
I am still experimenting with the compressor power and the starting power during the preliminary control phase using a trial and error approach :-P
The heat pump basically runs continuously. The heating cycle is only interrupted by domestic hot water production.
Most heat pumps have problems with short cycling during the transition period due to their high output. That is why I set the hysteresis to 3K (at 18°C / 64°F) and 2K (at -15°C / 5°F).
So far, I think the result is quite good with the ERR activated.
I am still experimenting with the compressor power and the starting power during the preliminary control phase using a trial and error approach :-P
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