I just would like to thank you for this information!!!! I am in the middle of researching for making and designing my own super efficient fridge.
1 I plan to incorporate super insulating by making my own cabinet.
2 I plan on using the outside air to cool in the winter(i live in Canada so should be 4 to 5 months of free cooling
)
3 I plan on putting a small door in the regular door for access to milk and other commonly used items to help limit cold air escaping.
and now thanks to this thread i plan on moving the hdc into the crawl space.
if anybody has any other other suggestions i am open to anything crazy or not seeing as most of mine usually are