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Elite Member
- Joined
- Sep 26, 2008
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Try googling an octopus furnace, which is the more common version.
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True hypocausts went out of fashion with the Romans and the abandonment of child (slave) labor to sweep between the support pillars. A version of it was used in traditional Korean homes until fairly recently. Like hydroponic in floor heat, it is very efficient.
All the best,
Peter
We had one of those when I was a kid. It was originally coal-fired, but when we were there it had already been converted to natural gas. That thing could give kids a nightmare! Looked more like an upside down spider.