Comment by spinningarrow

A lot of newer (last 15 years or so) apartments in Oslo have a mixture of ‘natural’ ventilation through vents that let in cold air and mechanical ventilation in wet rooms, and even newer builds are starting to use ‘balanced’ ventilation that heats up cold outside air using heat from air that is being blown out https://www.byggmakker.no/rad-og-guider/kjokken-og-bad/vet-d...