ᐅ Location of the central ventilation unit

Hello everyone,

In our new build (gable roof house, 182 m² (1960 ft²), finished attic) we are installing a central ventilation system.

Since we have a carport next to the utility room, our architect prefers not to install the ventilation unit in the utility room due to concerns about exhaust fumes, stale air, etc.

Instead, the system is planned to be installed in the finished attic. We have some concerns about noise and sound transmission throughout the building, especially since a children’s bedroom is located directly under the attic.

What are your thoughts on this issue?
How do you access the filters of the intake duct on the roof?

Thank you in advance.

The filters are located inside the unit.
I would have no issue with installing it in the attic, provided that the attic is within the heated building envelope.
This way, you avoid unsightly grilles on the facade.

You can also run the intake pipe across the carport, or underneath it, or add another LEWT right away. I wouldn’t place it in the attic...

I find the attic to be the ideal installation location, provided it is not an unheated attic. The units hardly make any noise anymore, let alone any vibrations. Exhaust air should be vented through the roof, with fresh air intake at the rear of the facade.

In most cases, there is an unheated attic, so that is already ruled out.
The devices are also noisy, at least compared to other equipment in the house.
All the ventilation ducts need to be routed to the ground floor and the upper floor, which requires space and adds cost...
In a bungalow with a warm roof, this might be feasible, but in a typical single-family house, in my opinion, it is not a smart choice.

Our ventilation system will also be installed in the attic. I don’t see where the duct issue is. All outlets are in the ceiling, so the ducts for the upper floor are already running along the correct floor slab, and the ducts for the ground floor just need to pass through the upper floor once. If the system were installed on the ground floor, all the ducts would have to run through half of that floor, and the ducts for the upper floor would also have to run through the upper floor once more. What would be gained there?

The space we save in the utility room could then potentially be used for a wine cooler 🙂 We do lose some space in the attic, but that doesn’t matter since we have plenty, and it’s not really usable beyond the access hatch anyway because there is only 1.40 m (4 ft 7 in) of standing height.