the.com/central heating
the invention that let civilization stop arguing about who sits closest to the fire.
means a single system that heats an entire building from one source, piping warmth to every room instead of burning something in each one.
from the romans rigged hypocausts under floors to channel hot air from furnaces, but the modern version came from 1800s steam and hot-water boiler systems built for factories and hospitals, later shrunk down for homes.
roman precedenthypocausts heated bathhouse floors 2,000 years ago
boiler erawidespread home use only took off after 1900
thermostat lagautomatic temperature control arrived decades after the pipes did