ᐅ Installing a ventilation system outside?

Hello,
I wanted to ask whether a ventilation system always has to be installed inside the house, or if it is also possible to install it externally (directly on the exterior wall) and then insulate the entire house with polystyrene. Are there any issues with thermal bridges in this case? The house is completely detached.

If the pipes are embedded in the insulation, there will naturally be less insulation at that point, resulting in a thermal bridge. If you want to retrofit a ventilation system in your house, consider a decentralized system.

Whenever building components are installed within the insulation, I get seriously concerned from an energy efficiency perspective. Our structural engineer and energy consultant strongly advised against it, as it will cause thermal bridging.

nordanney schrieb:
Whenever structural components are installed within the insulation, all my hairs stand on end from an energy efficiency perspective. Our structural engineer and energy consultant strongly advised against it, as it will cause thermal bridges.

That’s why I’m asking 🙂

One question though:
If the inside temperature is around 20°C (68°F) and outside it’s 0°C (32°F), the air in a decentralized ventilation system gets exchanged... On average, shouldn’t the outgoing air then be about 10°C (50°F)? Isn’t that a huge energy loss? Of course, if I open the window, air at 0°C (32°F) comes in, but I only ventilate once a day, right?

Regards

Not necessarily. Decentralized systems also exist with heat recovery and an efficiency of up to 90%.