ᐅ Question about daily living with a mechanical ventilation system with heat recovery
Created on: 11 May 2016 08:04
B
Becker84
Hello, my question is aimed at those who already live in a well-insulated house with a controlled ventilation system: How does it work in winter after a long hot shower? In my case (an apartment from the 2000s), the bathroom becomes foggy, the tiles are all wet, etc., meaning I have to ventilate thoroughly.
Is there a "boost" function to remove the moisture from the bathroom? Or do you have to open the window the traditional way?
How is it in summer when you want to sleep with the window open?
Can you turn off the ventilation completely during the night?
Or, if you are not at home during the day, can you reduce or pause the ventilation?
Is there a "boost" function to remove the moisture from the bathroom? Or do you have to open the window the traditional way?
How is it in summer when you want to sleep with the window open?
Can you turn off the ventilation completely during the night?
Or, if you are not at home during the day, can you reduce or pause the ventilation?
S
Sebastian7912 May 2016 06:58I’m not aware that this is the case—how would a mechanical ventilation with heat recovery system know that? There are no pressure difference sensors in these systems.
At least not in the standard units installed—I don’t know what he implemented there with KNX.
You can open the windows, which definitely doesn’t cause any issues with systems from Zehnder, Helios, or Danair (these are the ones I’m familiar with).
By the way, I believe that tilt ventilation does have an effect—at least right now, in the transition room, we have two windows tilted open, creating a draft—contrary to what is often claimed. In winter, the cooling effect is different, but you shouldn’t generalize right away.
At least not in the standard units installed—I don’t know what he implemented there with KNX.
You can open the windows, which definitely doesn’t cause any issues with systems from Zehnder, Helios, or Danair (these are the ones I’m familiar with).
By the way, I believe that tilt ventilation does have an effect—at least right now, in the transition room, we have two windows tilted open, creating a draft—contrary to what is often claimed. In winter, the cooling effect is different, but you shouldn’t generalize right away.
Well, even the simplest mechanical ventilation system with heat recovery can detect when the filters are clogged. It doesn’t use differential pressure switches; instead, the pressure differences are determined based on the power consumption of the fans.
If you access the system settings in enough detail, you can usually see the pressure differences live on the display. With my system, for example, it’s also possible to create a slight positive or negative pressure inside the house, which the system then maintains—although it’s only a few pascals (Pa).
Without constant monitoring of the pressures, the mechanical ventilation system wouldn’t be able to operate according to specifications. Calibrating the system would also be pointless.
If you access the system settings in enough detail, you can usually see the pressure differences live on the display. With my system, for example, it’s also possible to create a slight positive or negative pressure inside the house, which the system then maintains—although it’s only a few pascals (Pa).
Without constant monitoring of the pressures, the mechanical ventilation system wouldn’t be able to operate according to specifications. Calibrating the system would also be pointless.
S
Sebastian7912 May 2016 08:22And if that were the case, what would be so bad about leaving a window open? It would then be a temporarily constant condition – or are you also not allowed to walk through a patio door or even open the front door for a chat?
Especially with EC motors, there is hardly any wear...
By the way, I don’t see any pressure gauges on the Helios, only rotations per minute.
Especially with EC motors, there is hardly any wear...
By the way, I don’t see any pressure gauges on the Helios, only rotations per minute.
That’s just how it is, you can believe that.
That’s exactly the problem. Leaving a window open overnight or during the day creates a condition that lasts for hours, deviating from the "usual" setting. So why even have technicians come to calibrate and measure everything? You could just leave all the valves 100% open. The system will regulate itself, right?
With short-term changes (like an open patio door), the systems handle it well within their hysteresis. How long this can last, of course, only the manufacturer knows. But when it goes on for hours, the system starts compensating, which leads to increased wear and tear and also higher electricity bills.
Yeah, try telling that to the bearings inside...they don’t care much how the motor is driven...and they do eventually wear out too...faster, of course, under extra strain.
Sebastian79 schrieb:
? Then it’s a temporarily constant condition
That’s exactly the problem. Leaving a window open overnight or during the day creates a condition that lasts for hours, deviating from the "usual" setting. So why even have technicians come to calibrate and measure everything? You could just leave all the valves 100% open. The system will regulate itself, right?
With short-term changes (like an open patio door), the systems handle it well within their hysteresis. How long this can last, of course, only the manufacturer knows. But when it goes on for hours, the system starts compensating, which leads to increased wear and tear and also higher electricity bills.
Sebastian79 schrieb:
Especially with EC motors, there’s hardly any wear and tear...
Yeah, try telling that to the bearings inside...they don’t care much how the motor is driven...and they do eventually wear out too...faster, of course, under extra strain.
S
Sebastian7912 May 2016 09:13Of course, you can also go too far with such opinions...
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