It’s different here….

In cold-climate countries, you would never see the type of white vent blocks in the picture above. They indicate the presence of a toilet and are open to allow air to circulate. In countries with a real winter, a building is always “tight,” to prevent heat from escaping. That isn’t a problem here as is further indicated by the pipes on the outside of the wall–instead of inside the wall–because there is no danger of their freezing.