Garage Refrigerator Size (how much, appliance, cabinet, insulation)

[Solere]

I have a thirty year old 30.7 cu ft side by side Sub Zero refrigerator/freezer in my garage that works well but is very poor on energy efficiency. I am not sure of the cu ft space of the freezer and refrigerator sections. The freezer section is usually 2/3rds full and the refrigerator part 1/2 full. I purchased a 7 cu ft. chest freezer at a big discount and as wondering size wise, what additional size refrigerator or top/down refrigerator/freezer would I need to purchase in order to have the same space for food items as I have now with the amounts full as stated above? Would you take a chance on a used unit made after July 1, 2001, which is the most recent energy efficient standard?

[Barking Spider]

Depends on how much stuff you can toss because of freezer burn. Open the doors on a few and estimate what you need.

[wireyourworld]

You could always get a tape measure, measure the interior and do the math.

They make these appliances differently now, maybe more insulation I don't know. But we had to get a larger fridge in the house to have the same interior space of the old one. It barely squeezes into the spot and we had to remove the cabinet that was above the old fridge as the new one is taller. Anything that would have slid right into the old space was much smaller on the interior.

[Bideshi]

A top freezer design is more energy efficient than a side by side.