ᐅ For exhaust ventilation systems – where should the fresh air intake come from?

We want to ventilate three rooms in our newly built house. We have a chimney and a kitchen exhaust hood with venting, but we are unsure where the fresh air should come from. It is a KfW 70 house:

1) Interior guest bathroom in the basement: Since the bathroom has no light well, we plan to install an exhaust unit here, which will vent through the light well in the adjacent room.

2) Utility room on the ground floor: We actually want a unit with both supply and exhaust air including heat recovery. However, the exterior wall is the main entrance area of the house, so for aesthetic reasons, we do not want an external unit here. Is there such a unit that can be installed, for example, in the upper floor and supply both supply and exhaust air to the room through ducts?

3) Bathroom on the upper floor: Here we will install a standard unit with supply and exhaust air including heat recovery.

For those who have installed exhaust units as well – where do you get the supply air from?
How can the problem in the utility room be solved?

Thanks for your help and ideas!

Is the house already built or is it still in the planning stage?

Hi,

try searching for Blumartin. They manufacture decentralized ventilation units that can supply air to additional rooms via ducting. It’s basically a hybrid between a central and a decentralized system.
Alternatively, you might reconsider a fully central ventilation system. Without a floor plan, it’s hard to assess, but if you need multiple devices and wall penetrations otherwise, it might not necessarily be more expensive.

Best regards,

Andreas

Bieber0815 schrieb:
Is the house already built or still in the planning stage?

The shell construction has started – the basement is almost finished.

andimann schrieb:
Hi,

try searching for Blumartin. They manufacture decentralized ventilation units that can also supply air to additional rooms via ductwork. It’s basically a hybrid between a central and decentralized system.
Alternatively, you might want to reconsider a fully central ventilation system. Without a floor plan, it’s hard to assess, but if you otherwise need multiple units and wall penetrations, this might not be more expensive.

Best regards,

Andreas

Hello Andreas,
thank you for the tip. It looks very interesting!!

Good luck
Karen

Hi,

oops....

Karen78 schrieb:
The shell construction has started – the basement is almost finished.

To put it mildly, it’s a bit late to be worrying about this now. At this point, you will likely only achieve a suboptimal solution at higher costs.

Good luck!

Best regards,

Andreas