A Roman hypocaust has been lit in Somerset for the first time in 1,550 years (give or take a few). The underfloor heating system was fired up a few days after the flues had been finished. The flues drew well, over the course of 5 hours raising the floor temperature by c.6 degrees at the end furthest from the furnace. Closest to the furnace the temperature of the floor surface reached 57 degrees. Scorchio!

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