AirVent
Today most people in the north are obsessed with saving energy, and heat in particular. Double or triple glazing, wall insulation and so on. It can accidentally result in creating a hermetically-sealed box in which to live.
In the 'old days' coal and wood fires were common, And later gas. Burning anything produces large quantities of moisture. If it isn't vented outside, the home becomes damp and mouldy; quite unfit for habitation.
So, as you walk around this city, you will see many air-vents similar to this one, located just below floor level of the house. Cool, fresh air is drawn into the house to help avoid the buildup of damp.
Not clever, just physics and common sense!
AirVent
Today most people in the north are obsessed with saving energy, and heat in particular. Double or triple glazing, wall insulation and so on. It can accidentally result in creating a hermetically-sealed box in which to live.
In the 'old days' coal and wood fires were common, And later gas. Burning anything produces large quantities of moisture. If it isn't vented outside, the home becomes damp and mouldy; quite unfit for habitation.
So, as you walk around this city, you will see many air-vents similar to this one, located just below floor level of the house. Cool, fresh air is drawn into the house to help avoid the buildup of damp.
Not clever, just physics and common sense!