• Post Reply Bookmark Topic Watch Topic
  • New Topic
permaculture forums growies critters building homesteading energy monies living kitchen purity ungarbage community wilderness fiber arts art permaculture artisans regional education experiences global resources the cider press projects digital market permies.com all forums
this forum made possible by our volunteer staff, including ...
master stewards:
  • Nicole Alderman
  • r ranson
  • paul wheaton
  • Burra Maluca
  • Jocelyn Campbell
  • Miles Flansburg
  • Devaka Cooray
garden masters:
  • Dave Burton
  • Anne Miller
  • Daron Williams
  • Greg Martin
  • Joseph Lofthouse
  • James Freyr
  • Bryant RedHawk

hottest thermal mass ever.  RSS feed

Posts: 32
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
What is the hottest external thermal mass anyone has ever heard of? Also what would is a safe thermal mass high temperature.
Posts: 4154
Location: Northern New York Zone4-5 the OUTER 'RONDACs percip 36''
books fungi hugelkultur solar wofati woodworking
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Philip Baldwin : You must school your self to understand two specific conditions, 1) the Materials ability to adsorb the Freaky Hot Exhaust Gases, its

Specific Heat Capacity, and its ability to deliver that Heat Energy through itself to the Surface of our Cob Thermal Mass Bench, its Thermal Conductivity

As Soapstone has exactly what we want I have shared a link below :


Please note that this site traditionaloven.com is a vast source of practical information mostly without a lot of jargon using simple terms

More technical information from the engineeringtoolbox.com site with link



Sorry this was not more timely, hopefully it will make up for that by its usefulness, For the Crafts ! Big AL
Posts: 2765
Location: Upstate NY, zone 5
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Safety is relative to usage and location. A surface accessible for long-term contact by children should not exceed a temperature that will scald, that might be 105F to 130F. A surface only reachable by intent can be hotter depending on location and audience...

The safety of a given temperature is also dependent on its conductivity, which is how fast heat travels through it. Metal is highly conductive and can cause a burn quickly, while cob is less conductive and will take considerably longer to cause damage on contact. Soapstone is relatively conductive and may need to have a lower surface temperature than cob to be safe.
Do the next thing next. That’s a pretty good rule. Read the tiny ad, that’s a pretty good rule, too.
Grow a Salad in Your City Apartment E-book - By Rosemary Hansen
  • Post Reply Bookmark Topic Watch Topic
  • New Topic
Boost this thread!