Good video. I like to see guys refining their designs. As for the fridge it is a thought. How would you consider connecting the two?
With the heat exchanger built into the RMH, and a wall separating the two, and extended insulated plumbing piping. There is a number of ways that this could possibly work, would have to experiment with it. Since propane stoves work with liquid ammomnia, it is earier to work with than freon or what ever. 
"We 'Prep.' to live after a downfall, Not just to survive."
With the heat exchanger built into the RMH, and a wall separating the two, and extended insulated plumbing piping. There is a number of ways that this could possibly work, would have to experiment with it.
It would be lovely if you started holding classes with your wealth of information
Whoa, just saw this video, massive RMH, I believe built in Korea and translated to Japanese. Don’t worry about the language, watch this step by step. Very impressive, But, I would incorporate an updraft heater at the end, to increase start up draft.
"We 'Prep.' to live after a downfall, Not just to survive."
My wealth of information is mainly just guess work and putting together ramdom pieces. I hate wasted energy.
"We 'Prep.' to live after a downfall, Not just to survive."
stayin put