I have built my icebox using 4" of PolyISO insulation with has an R-value of 12.9 per 2" according to the manufacturer. This will be accessible from the countertop in a side by side freezer/fridge design. I am hoping to have a freezer system with a spillover fridge. I am working with a company to provide a condenser with a coldplate for the freezer. There'll be two fans in the separation wall that will be controlled by a thermostat in the fridge.
The inside of the icebox is lined with 1/4" marine plywood and covered with 6oz fiberglass cloth using West Systems epoxy resin. I plan to apply white gel coat tomorrow.
The rough opening for the fridge is 13" x 17" and it is 30" deep. The lid will be 12"x13" and will use 2" of insulation.
The freezer is on the left side and is against the hull. The bottom uses 6" of insulation and 4" of insulation on the sides. The top dimensions are 12" x 17" and it tapers down to 4.75" x 17", it is 25" deep. The lid of the freezer will be 12" x 12".
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