Types of Burn Chambers for Rocket Mass Heaters

What works best? Ever ask yourself that question?
When it comes to build a rocket heater have you considered what type of building materials would make for the best burn chamber?
Are you good with brickwork? We weren't.
Ever use refractory cement? We hadn't.
What do the pros build with? Is there a plug and play type of system?
Well, welcome to our world. Inside this booklet are various versions of burn chambers currently being used by backyard builders as well as the pros.
Written by Ray & Randi Dudley, authors of "Lessons from Our Rocket Mass Heater" and packed with photos, links and resources we take a look at everything from the tried and true brick builds to the cutting edge materials and shapes employed by the innovators and pros. We present the pros and cons plus we talk about things like cost, ease of use and we even look at some unique builds.