An interesting thread as I am seriously considering a second “cupboard” to add to my existing Eurocave Confort. That is pushing 20 years old and has spent the last 16 years in our (integral) garage.
With both cooling and warming functions the Eurocave keeps the temperature at 10.5C +/- 1C all year around - checked with a separate thermometer. Even in the current heatwave it doesn’t run much. No doubt helped by the fact it stands next to an internal wall and the up and over door faces north - ie gets very little direct sun. A detached, and worse still flat roofed, garage would, I suspect, be a much greater challenge.
While the “buy the biggest you can afford” mantra may be correct I would offer one word of warning. When I bought mine, the expert advice was that to run efficiently a Eurocave (and I assume any similar product) needs to be kept as full as possible. The volume of liquid being stored is apparently a big factor in regulating the internal temperature. Heating and cooling air (ie empty space) supposedly uses up a lot more energy. I’m no expert in thermodynamics but another member might be able to confirm or deny this.
The charcoal filter is partly there to help keep strong odours out that could permeate the cork and taint the contents… In a garage there are all sorts of challenges from the petrol lawnmower to tins of paint etc etc. Let alone exhaust fumes if you are one of those rare people who actually keeps a car in the garage! Kitchens and utility rooms also generate a lot of strong smells…
Would be interested to hear reviews of other brands that have both heating and cooling functions as my second cupboard will be in he garage too.