In Europe there is a UNI norm, dating back to 1974 or so, mandating the need of both an evacuation and an air inlet in case of gas stoves.
Even if it is essentially for safety, it has (where implemented correctly) the side effect (advantage in this case) of creating a flux of fresh air.
Where this is not needed by the norms (electric stoves and similar), expecially in modern "energy saving" houses, problems of humidity and mold often arise.
As said in other threads, our grandmothers and mothers used to open all windows briefly every morning, nowadays - for one reason or the other - most people do not do this and - coupled with the increased air tightness of windows and doors - makes mechanical ventilation a need.
Even if it is essentially for safety, it has (where implemented correctly) the side effect (advantage in this case) of creating a flux of fresh air.
Where this is not needed by the norms (electric stoves and similar), expecially in modern "energy saving" houses, problems of humidity and mold often arise.
As said in other threads, our grandmothers and mothers used to open all windows briefly every morning, nowadays - for one reason or the other - most people do not do this and - coupled with the increased air tightness of windows and doors - makes mechanical ventilation a need.