Properly built modern houses would certainly not be the realm of slightly less bad resistive heating improvisations. But here in Germany we have plenty of old s

Properly built modern houses would certainly not be the realm of slightly less bad resistive heating improvisations. But here in Germany we have plenty of old stock modernised to the point where is sufficiently air tight for insufficient ventilation to become an issue (and often it does!), but not to the point of active ventilation. Moisture buildup is a major concern, particularly at times of heating scarcity (which is when improvisations become more likely) As I said, different environments.