Rocket Mass Heater Build

This is the first of 2 videos about a Rocket Mass Heater I am building. This is the longer one that describes the steps I took in its construction. A later video will come that shows it in operation. I got ideas from the following videos: I don t have a construction skill set so I am learning as I go. Made my first concrete on this build. I have done some woodworking and have read up on building molds for concrete counter tops in the past. Certain things would have been easier with a 55 gal oil drum,