Electric window opening as an alternative to a ventilation system?

Look at minute 1:52

Wow... yes

I don’t understand that - how does that work? Or is this consumer deception again???

That is magic, not a trick

Actually, I don't think the system is that bad. In my opinion, better than no ventilation at all.
I'm just not sure if you can't almost get a controlled ventilation system for the price.

Yes, I also don't really believe in keeping the heat in the room. They rather mean the comparison that the parallelly opened windows lose less heat than normally tilted windows. But I don't care, I expect some energy loss and have no problems with that. We compared the costs that the construction company incurs for removing the windows + decentralized ventilation with those incurred by the window manufacturer for 6 electrically operated windows (the rest are also these windows with parallel opening, but without electric drive). We were still about €5,000 below the costs of windows from the construction company + decentralized system.

Hello,

in my personal opinion, you are not doing yourself any favors with this type of ventilation. Especially in winter, you will always feel colder areas and possibly drafts in the area of the windows placed parallel to each other.

An acquaintance of ours has installed a decentralized ventilation system that takes in fresh air through 5 mm wide (closable) slots in the window frame – however, these are always closed at their place due to cold bridges and drafts at temperatures below 5°C.

So, to put it bluntly, you can forget about decentralized ventilation during the winter months.

I consider these windows a good solution when renovating an existing property, but there are better alternatives for a new build.

How about removing the windows from the construction contract, awarding "normal" windows to the cheaper window manufacturer, and having your central ventilation system with heat recovery installed by the construction company?

Just calculate with continuing rising energy costs how much money you will actually be throwing out the window over your expected usage period…

Regards,

Dirk

Hello Yvonne,

I watched the video (without sound. Is there sound? I’m always online without sound...)

Then your microphone settings on your phone or speaker settings on the PC/Mac are not correct

Rhenish greetings

Hello,

in my personal opinion, you are not doing yourself any favors with this type of ventilation. Especially in winter, you will always feel colder areas and possibly drafts around the windows placed parallel to each other.

An acquaintance of ours has installed a decentralized ventilation system that obtains fresh air through 5 mm wide (closable) slots in the window frames – however, these are always closed in their case due to cold bridges and drafts at temperatures below 5°C.

So, to put it bluntly, you can toss the decentralized ventilation in the trash during the winter months.

I would also have concerns about point 1.
Regarding the information about your acquaintance, it should be said that he probably only installed an exhaust system (in the wet rooms). These exhaust vents create an indoor negative pressure, causing fresh air to be sucked in through the window slots.
This is the standard proposal for ventilation from our general contractor. For the reason you mentioned, we had this removed and arranged for a decentralized system with heat recovery.