Not always, I have seen such fridges with ducts running the hot air out. Or as othees mention, the heatpump outside and gas piping. Still losses to have to coo

Not always, I have seen such fridges with ducts running the hot air out. Or as othees mention, the heatpump outside and gas piping. Still losses to have to cool down to 5 Celsius instead of 20 Celsius though, makes the heat pump a lot less energy efficient.