mdunc
Member
I've had this sort of system on various Subaru over the years. Certainly helps accelerate screen defrost, especially if you haven't or can't preheat the cabin.
Also helps in deep frosts where wipers can freeze to screen and be damaged if operated while frozen to the screen.
In the UK, for most people, for most of the time the benefit will be speeding up screen defrost where you have not been able to pre heat the cabin or have only limited preheat time, such as having forgotten or for whatever reason the preheat didn't happen.
It's proved useful in the past, particularly when I lived in the Scottish Highlands.
Also helps in deep frosts where wipers can freeze to screen and be damaged if operated while frozen to the screen.
In the UK, for most people, for most of the time the benefit will be speeding up screen defrost where you have not been able to pre heat the cabin or have only limited preheat time, such as having forgotten or for whatever reason the preheat didn't happen.
It's proved useful in the past, particularly when I lived in the Scottish Highlands.