« on: March 28, 2014, 09:44:44 AM »
The efficiency comes from the difference in electrical consumption by the two - the chest freezer doesn't "spill" the cold out like an upright freezer or refrigerator, so opening it to remove something isn't causing a surge of warm air to enter to displace the cold air that falls out of an upright device. Of course, if all other things are equal, it makes sense that unopened vessels that are equally well insulated will be the same efficiency, but I open my freezers and refrigerators relatively frequently - weekly, if not more, but I try to minimize openings whenever possible.That's true. Once a week really isn't often enough that it'd make much of a difference, I wouldn't think. But I don't know. I do like having my chest freezer open while I'm kegging and noticing that the temp doesn't change much in the 5 or 10 minutes it might be opening (closed transfer from primary keg to serving keg, without having to lift the keg into the freezer, is a nice luxury of doing close transfers).
Meh. I leave my kegerator open when I'm bottling. It's small, the kegs take up most of the space. I can't imagine it takes that much energy to cool down the air again once I close it. The temp of the kegs doesn't drop, so the amount of additional cooling isn't really all that much. I suppose with a larger fridge it could be an issue and I wouldn't want the kids leaving the fridge open while they make a sandwich, but as far as pulling a pint now and then it's not something that concerns me. Plus, the wife pays the bills so I really have no idea what anything costs.