As part of our desire to keep a low energy footprint, we've lived for many years without a freezer, but lately I've been thinking of getting one, mostly for seed storage. It would let me make use of a larger percent of the seed I get from high-population crops before it loses germination, and let me space generations farther apart and thus grow more varieties (see inbreeding topic).
I'm trying to understand the relationship between 2 pieces of advice I've heard:
1. Any freezer or fridge made before (???date) will be extremely inefficient and is not worth using due to the cost of electricity compared to buying a new energy-effieient one.
2. Fridges and freezers made after (??another--or the same??? date) will not run correctly if they are kept in a garage or outbilding because they changed lubricants in the motor and it will not run when it is cold (but still warmer than you want your food/ seeds to be).
It would seem to make sense to keep the freezer in an unheated space rather than using energy ( cutting wood) to heat the house and then more energy to cool the freezer, but it sounds like that might not be possible. . .???
Anyone out there know the relevant years for this and whether they are related? And whether there was a window of efficient freezers that could still be kept in an unheated area?
Or understand refrigeration physics well enough to explain it to me?
What is your experience using freezer storage for seeds?