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I'm certainly no HVAC expert, but the threads I'm seeing suggest that any conversion might work better for initially converting a (already designed for and existing) freezer to a refrigerator first, then later converting back to a freezer.
You need to deal with both insulation and with the load on the compressor. An existing freezer will already have the necessary insulation and compressor system for freezing. Conversions from a freezer to a refrigerator mostly appear to primarily need a new thermostat, with both the insulation and compressor systems as overkill in a refrigerator mode.
Of course, if this is done as a DIY project, there probably wouldn't be any UL certification, and a question of insurance liability might also occur.
You need to deal with both insulation and with the load on the compressor. An existing freezer will already have the necessary insulation and compressor system for freezing. Conversions from a freezer to a refrigerator mostly appear to primarily need a new thermostat, with both the insulation and compressor systems as overkill in a refrigerator mode.
Of course, if this is done as a DIY project, there probably wouldn't be any UL certification, and a question of insurance liability might also occur.
