History

Underfloor Heating System in Roman Empire :

Caldarium; a hot room found in 'Classical Roman Baths'. Caldarium consists of a room called Hypocaust, which is heated by furnace located under floor, and walls that reflect the heat.

Hypocaust is essentially a centralized heating… pic.twitter.com/8jnE0Hm0e0

— Archaeo - Histories (@archeohistories) January 24, 2024