07-19-2008, 03:12 PM
ProTEC is R-20 which I don't consider adequate but it could be doubled up. Rastra is R-30 which is closer to the mark.
Some of our metal faced SIP panels can be up to R-50. They come with food grade surfaces too.
I guess my point about a walk-in unit is that chest freezers are only marginally efficient and have minimal capacity. By the time you have your cooling system figured out it isn't much more expensive to do a larger unit with actual capacity. Hence - a walk-in unit.
I'm intending one on my farm on of these days.
Some of our metal faced SIP panels can be up to R-50. They come with food grade surfaces too.
I guess my point about a walk-in unit is that chest freezers are only marginally efficient and have minimal capacity. By the time you have your cooling system figured out it isn't much more expensive to do a larger unit with actual capacity. Hence - a walk-in unit.
I'm intending one on my farm on of these days.
Assume the best and ask questions.
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