Why are fridges in cold climate countries not mounted into the wall of a house so the ambient air could cool the inside?

Question

Why are fridges in cold climate countries not mounted into the wall of a house so the ambient air could cool the inside?

In: 1559

Answer 1

Really old brownstowns and stuff in NYC on the first floor you can sometimes still see sealed up
Little ducts where the milkman would deliver the milk and cheese 100+ years ago and it was insulated to keep it cold like a fridge