Paul gave an in depth review of each of three rmh designs. One design by Paul, one by Ernie and a third by Erica. There was a review of rocket mass heater of the shipable cores. There is a fire problem in Paul's box design due to lack of insulation. 3 cores were built during the first workshop. First was Ernie's cob like core. Castable manifold footprint is most the difficult piece. Ernie likes partial barrel. Paul thinks its prone to leakage. Lots of tape and glue used which Paul doesn't like. Welding can replace tape but not easily welded. Ernie uses a small firebox called a puppy burner. First try failed due to a lack of insulation. Paul wants a design that will keep material costs around $100. Erica had a design that used a special goo. This goo made her manifold very light which Paul loved. The first core design with manifold design. Paul not a fan. Paul's design had 3" on bottom clay and perlite. Bigger safer but heavier. Four people to move it. Pocket rockets were plentiful. Less finicky. These were quick and simple. Shipable core design workshop used tried and true methods. Paul suggested using duct in place of stove pipe. The pebble style design will be tested this winter. Erica gets scientist of the year for her light weight design. There was a discussion of the cob style design and cost associated with it. Paul likes the idea of a shipable core in a wood box. If Paul can combine his design with Erica's light weight this would minimize shipping costs. A discussion of the shipping costs followed freight versus UPS and FedEx. A discussion of how to vent the rmh was reviewed. Thru roof versus thru wall was debated. Both have their pros and cons. Paul stated that air intake design can be problematic.
The tipi was reviewed and the cob style rmh built in the tipi was discussed.
Workshop for set for September of 2014 were set. October was just a little to chilly.
The first Wofati and the progress on the building was discussed and some plans for 2014 were mentioned.
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Location: NE Ohio (Zone 6a, on the cusp of 6b) 38.7" annual precip
posted 5 years ago
I found this to be an awesome podcast!
It's chock full of "lab reports" with lots of trials, results, and details!
It's like they opened up the lab reports and began to read.
- Answers to why all the buzz about Erica's latest take on a shippable rocket mass heater core
- First hand accounts of what it's like to live with different variations of rocket mass heaters and how pocket rockets were used
- A narrative about the wofati that includes 1) design decisions and their "whys", and 2) a reminder of where this solution fits (that 'w' in wofati is for woodland) 3) discussion from the team about amounts of wood and logging needed, and their take on impacts to the Land - Some tips from a master on tipis (poles and heating)
- Interesting descriptions and discussions from Emily, Jason and Tony, who have been "hands on" during the last few weeks, including some of the workshops
When I listen to this, I think: "I can hear the flywheel of Paul's vision for the Lab ticking over, and it's AWESOME!"