ᐅ Is an extractor hood necessary?

Hello everyone,

we are building a KfW40 house and have been advised by several sources against using a cooker hood with exhaust ventilation, as you then need to worry about sealing it off when the hood is turned off. Exhaust ventilation is not very important to me anyway.

This raises the question: do you even need an exhaust hood with a ventilation system, or does the ventilation system take care of it automatically?

Counterquestion: where should the cooking grease go? Into the ventilation system or into the grease filter of a hood?

I would choose a recirculating extractor hood for that. These filter the cooking air through a built-in filter, which should be replaced regularly (e.g., once a year, depending on the manufacturer). This way, your home ventilation system doesn’t have to deal with cooking air.

DNL schrieb:
Do you still need a range hood if you have a ventilation system, or does the ventilation system take care of it anyway?

Mechanical ventilation systems deliver significantly lower airflow rates compared to a range hood or recirculating hood, so they don’t effectively remove odors and grease from cooking. Also, as others have mentioned, no one wants greasy air going through the mechanical ventilation system. Therefore, a range hood or recirculating hood should not be omitted.

With a mechanical ventilation system, I also consider a recirculating hood at the front, but it can be quite expensive to get one that runs reasonably quietly.

Especially since the grease fumes are not captured at all by the mechanical ventilation system with heat recovery, even if the exhaust vent of the system is located directly in the ceiling above the cooktop. The grease fumes have cooled down enough at about 100 cm (40 inches) above the pan to start sinking back down. As a result, they settle on surfaces throughout the room.

This is a fact that makes ceiling-integrated extractor hoods ineffective. And these units have a much stronger suction power than a mechanical ventilation system with heat recovery.

@Alex85 then tell me how the grease always ends up on the wall cabinets