• Post Reply Bookmark Topic Watch Topic
  • New Topic
permaculture forums growies critters building homesteading energy monies kitchen purity ungarbage community wilderness fiber arts art permaculture artisans regional education experiences global resources the cider press projects digital market permies.com private forums all forums
this forum made possible by our volunteer staff, including ...
master stewards:
  • Nicole Alderman
  • r ranson
  • Anne Miller
  • paul wheaton
  • Joseph Lofthouse
  • Jocelyn Campbell
  • Mike Jay
garden masters:
  • Steve Thorn
  • Dave Burton
  • Joylynn Hardesty
  • Carla Burke
  • Pearl Sutton
  • Greg Martin

RMH possible in starplate dome?

Posts: 3
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
I'm building 5 guesthouses using the starplate dome hubs (icosahedron dome)

They are small cabins

Struts are 8'
Which the instructions say build a "dome" 12 feet wide , 11.5 high
And just 110 sq ft

Obviously the longest walls are 8'

I have the first roof going on and need to decide very quickly how I'm gonna heat these cabins since I'll have to leave room for a flu If  necessary (ferrocement roof)

I have a really thick earthen floor (3 feet) if that makes a difference

Should also add I live in Death Valley ... Although it's known as the hottest place in the world our winters get down to 20F in day and colder at night
But never to zero F.

I love RMH idea but is my dome too small? All the instructions I've seen, videos, photos they are all huge!

Thanks in advance
Posts: 2949
Location: Upstate NY, zone 5
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Your domes are quite small to heat with an RMH, but it should be doable if you are good at following directions and perhaps troubleshooting.

You would want the smallest feasible RMH, which for a standard J-tube design would be 4" internal system diameter. This size is known to be finicky, so I would test your construction before making it permanent. You could also build a slightly larger, and thus more reliable, version, 5" or 6" diameter, and just run shorter fires in it. Assuming the cold spells, and possibly occupancies, will be short durations, a smaller mass would be called for, as it will be more responsive to the firing schedule and warm up and cool down quicker than a massive system. I would not make shorter duct runs or smaller internal bell areas, but thinner masses that transmit heat faster.
Posts: 3040
Location: Southern alps, on the French side of the french /italian border 5000ft high Southern alpine climate.
The fastest and most reliable components of any system are those that are not there. Tiny ad:
2019 off grid bundle of stuff - September 10-16
  • Post Reply Bookmark Topic Watch Topic
  • New Topic
Boost this thread!