ᐅ So, are you sweating? We’re not! :P

I have a question about turning on a controlled residential ventilation system: is it allowed to do so without causing any issues? In our old house, there was no off switch; we could only disable it by switching off the circuit breaker. I also think I heard that continuous ventilation prevents the formation of germs.

haydee schrieb:

Some people don’t set their ventilation system to bypass, so the heat recovery is running.

Isn’t that actually counterproductive when it’s hotter outside than inside? The heat recovery unit is basically just a simple heat exchanger and mostly keeps the heat where it is (in this case outside), right?

That’s right. Use bypass only when it is significantly colder outside, for example at night.

You should never turn off the ventilation completely. It can only be done by unplugging it, not via an app. There is a good reason for this.

Good question. It is probably allowed.

Our factory setting for summer mode is that the system switches off as soon as the outside temperature equals the inside temperature and turns on again when the outside temperature is 3 degrees Celsius (37.4°F) below the inside temperature for 1 hour.

Here, it cools down at night, even below 20 degrees Celsius (68°F), but for only the past 2 days has the 3-degree (5.4°F) difference not been reached for more than 1 hour.

So, I ventilate manually and keep the system running at the highest setting. In the morning, I want the outside temperature to be equal to the inside temperature.

It would be nice if the summer mode switched to negative pressure ventilation at 3:45 a.m. for 90 minutes at night (wishful thinking).

Only with heat recovery does the possibly cooler outside air at night pass through the recovery system and operate continuously.

During the first heatwave, I wasn’t mistaken, and the heat recovery was still on—yes, it was warm.

For us, the adjustment makes a difference of a few degrees.

Hmm, it’s 40°C (104°F) outside and 25°C (77°F) inside, without air conditioning, just with blinds during the day when no one is home and open windows at night...
so far, it’s quite bearable... if it stays like this for another three weeks, it will probably get warmer inside too... ugh.

Even though my comfort temperature is between 12-20°C (54-68°F)...