Our Coffee Farm + Future Cafe, Copán Ruinas, HND

[AdventureCopan]

Does anyone know if when running roaster exhaust pipe out a wall would I need to use special insulation in the wall to protect from heat? How hot does the pipe actually get? It's double walled insulated pipe I'm using. Thx!!

 

[AdventureCopan]

Still working on the roaster.