How much food fits in 6.7 cu. ft.?

Roughly a quarter of a full-size upright fridge-freezer's capacity. It holds several large cuts of meat, frozen vegetables and batch-cooked meals, but not a whole animal.

Does it need manual defrosting?

Yes. It is a manual-defrost chest freezer, so ice builds up over time and needs clearing once or twice a year. Plan for that when siting it.

What does fast freeze do?

It runs the compressor harder to drop the interior temperature quickly, which helps preserve texture and nutrients when you load fresh food. Switch it back to normal once the food is frozen.

Can it run in a cold garage?

It is a freestanding chest freezer, but check the rated ambient temperature range before putting it in an unheated space. Very cold rooms can stop some freezers cycling properly.