Originally Posted by Bryan L.
How do you construct box larger than the fridge and then get it through a smaller fridge-sized hole? This was definitely a bigger project than anticipated to add this after it has left the factory. This might explain why there are very few, if any, tutorials on how to exactly go about doing this. It's a royal PITA.
I used tongue and groove flooring to build a separating wall inside the cabinet one strip at a time. I used 2 vertical supports on opposite sides / ends to hold it all together.
These threads I posted a while ago might give you some ideas.
Restoring Our 1972 Boler American
Improving fridge venting
Since they are old threads, pictures and linked topics might be missing/broken due to the numerous changes on this site over the years.
On edit: wow this site is getting funky. I really had to work around automatic mis-naming of links.