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Old 12-05-2016, 11:33 AM
TriPolar TriPolar is offline
Join Date: Oct 2007
Location: rhode island
Posts: 38,138
About the only true advantage of a round structure is that it can be easily built on a single small central pillar. In some terrain this becomes practical, but as noted above it is very difficult to make efficient use of the space. The efficiency of heating is a misleading, the construction materials and insulation matter far more than the shape of the house in modern times. If you had to make a house out of uninsulated low thermal mass materials then a round structure will be more heat efficient, but far more inefficient than a house with a huge difference in surface area to volume that is properly insulated.