Winter cover fridge

[Jev88]

Hi
I have an old RM4271 fridge. Would there have been an external winter cover available?
What is its job? Just to seal off from unwelcome visitors whilst in storage?

 

[M-J]

Have the actual vents got part numbers?

 

[Richard n Ann]

It's for ambient temperatures below 10c so the heat won't dissappear without driving the fridge.