ᐅ Warm bedroom in a house with ventilation including heat recovery
Created on: 21 Apr 2016 21:56
P
Payday
Hello,
we have a central ventilation system with heat recovery. In the bedroom, the heating is turned off, yet in the evening at 10 pm, the temperature is still 21°C (70°F) while it’s 10°C (50°F) outside. All windows are, of course, closed. There is one air outlet (air supply) in the bedroom. The shutters were closed during the day, so very little solar heat entered. Still, it always gets too warm in the evening. Could this be caused by the heat recovery ventilation system, which is supplying warmer air into the room than expected? What could be done about this? Lowering the temperature of the heat recovery system doesn’t seem to make sense, as that would defeat the whole purpose of the system. Slightly opening a window helps little if the shutters are open.
How have you solved this or what else could be causing it? The heating is definitely off, and the display on the distribution box also shows it as closed.
Overnight it gets even warmer because the resting heat from two people exceeds the heat loss to the outside.
we have a central ventilation system with heat recovery. In the bedroom, the heating is turned off, yet in the evening at 10 pm, the temperature is still 21°C (70°F) while it’s 10°C (50°F) outside. All windows are, of course, closed. There is one air outlet (air supply) in the bedroom. The shutters were closed during the day, so very little solar heat entered. Still, it always gets too warm in the evening. Could this be caused by the heat recovery ventilation system, which is supplying warmer air into the room than expected? What could be done about this? Lowering the temperature of the heat recovery system doesn’t seem to make sense, as that would defeat the whole purpose of the system. Slightly opening a window helps little if the shutters are open.
How have you solved this or what else could be causing it? The heating is definitely off, and the display on the distribution box also shows it as closed.
Overnight it gets even warmer because the resting heat from two people exceeds the heat loss to the outside.
I am really looking forward to this – quietly hoping that the solid construction pays off. I already found out in March how important shading is. We have 9 sqm (97 sq ft) of south-facing windows in the living room – in the evening, the room was about 3°C (5°F) warmer than everywhere else (which was quite cozy – but it was cold outside, too).
Interestingly, the temperature difference quickly evened out again.
Interestingly, the temperature difference quickly evened out again.
merlin83 schrieb:
I also believe that spending 5,000 to 10,000 for air conditioning in the living room and bedrooms in a new build is very well invested. Just two summer days at 40°C (104°F) make indoor temperatures unbearable. I also rely on the solid construction and roller shutters. Our neighbors with exactly the same system (same company, just a different house type) reported comfortable indoor temperatures. Of course, you can’t expect 15°C (59°F) inside.
An air conditioner is definitely a great feature. The only downside is that it can’t be directly connected to the ventilation system (condensation…). I’m not familiar with this split system technology. Otherwise, we would have definitely had it prepared.
@BeHaElJa @Payday
We also used solid construction.
Once the house has warmed up after some time, it takes a while to cool it down. The method suggested by @EveundGerd definitely helps. In summer, you can also leave the upper windows fully open overnight. Of course, only where they are inaccessible from outside due to burglary risk. Ideally, open them shortly before going to bed, as temperatures in midsummer become comfortable only late at night. Naturally, the windows should be closed early in the morning.
The second tip, “shading,” has already been mentioned. This definitely helps. However, you should not expect huge temperature differences. A reduction of 1 or 2 degrees is always possible.
I can’t say if there is a difference between solid and prefabricated construction, as I have no comparison.
We also used solid construction.
Once the house has warmed up after some time, it takes a while to cool it down. The method suggested by @EveundGerd definitely helps. In summer, you can also leave the upper windows fully open overnight. Of course, only where they are inaccessible from outside due to burglary risk. Ideally, open them shortly before going to bed, as temperatures in midsummer become comfortable only late at night. Naturally, the windows should be closed early in the morning.
The second tip, “shading,” has already been mentioned. This definitely helps. However, you should not expect huge temperature differences. A reduction of 1 or 2 degrees is always possible.
I can’t say if there is a difference between solid and prefabricated construction, as I have no comparison.
P
Peanuts7425 Apr 2016 11:23So, we keep our mechanical ventilation with heat recovery (Zehnder Comfoair 350) running on a low setting during the day (not on away mode, but setting 1). At night, when sleeping, it switches to a medium setting around 2 or 3 a.m. You don’t notice it while sleeping, and the bedroom (including the dressing area, almost 30m² (320 sq ft)) always has enough oxygen. In the morning, we just briefly air out the room, and that’s it.
In summer, when it’s really hot, we switch the mechanical ventilation to away mode during the day and close the shutters in the bedroom. We then only turn the ventilation on to setting 1 when going to bed, and at night it switches back to setting 2 until around 7 or 8 a.m., as long as it stays relatively cool outside. This way, we achieve the best results for us...
In summer, when it’s really hot, we switch the mechanical ventilation to away mode during the day and close the shutters in the bedroom. We then only turn the ventilation on to setting 1 when going to bed, and at night it switches back to setting 2 until around 7 or 8 a.m., as long as it stays relatively cool outside. This way, we achieve the best results for us...
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