It honestly all comes down to what's available on site, because you have to build and improvise with what you got... sometimes there might be resources for a triple tank, sometimes a breadbox, sometimes a greenhouse batch. That's the real rub under the circumstances, and given those circumstances, teaching the mechanics of and the differences between, and how to assemble each type would probably be far more beneficial than just sending a bunch of pictures and telling them, "try to build this". Of course, that means more resources to dedicate towards accomplishing the goal, but better to teach how to fish than just give the fish. If they know
how the basic types work and tricks to optimize, that gives them the freedom to improvise with whatever they can get their hands on.
The Mother Earth News article is a good starting point, but I'm personally having problems finding any pre-existing guides detailing the information that they do need to potentially translate and pass along. I've been a bit too long out of the permie culture at this point to know what may already be out there to spare you from potentially re-inventing the wheel for the folks there in Syria. With that in mind, let me encourage you to actually take this question to the folks on the forums over at
https://richsoil.com/In addition to potentially better answering this question for you than most folks here ever could given their own focus, you might find other permaculture resources and technologies that may be of great benefit to have taught and passed along to the refugee craftsmen and engineers in the area. A great example would be the
Rocket Stove Mass Heater (again at Richsoil), which requires about 80% less wood fuel to heat a home with versus traditional stove designs, and can be built with minimal and sparse resources. Hugelkultur beds and wofati shelter techniques might be useful resources there to pass along as well.
