I need to replace a larder fridge which is kept in unheated accommodation. The old Electrolux running on R12 has given up.

Retailers tell me that modern fridges shouldn't be used in out-buildings. They say if I want to risk it I should go with the German makes as they use better quality refridgerants (R600a), yet some fridges running on R600a are also marked not for use in out-buildings.

It seems there is no official Climate Class that goes lower than 10°C (SN: sub-normal). (The old Electrolux was N: normal).

If the outside temperate is colder than 4°C then the fridge has nothing to do. Between 5 - 10°C I would like it to function normally, and above 10°C its working within spec.

The BP of R600a is -10°C at normal pressure, but I'm assuming that within the sealed system on the LP side the BP is going to be a bit higher. If the ambient temperate is below the BP pressumably I have a problem.

Could someone explain what the problem/risks are and offer advice please?

Thanks