Back at her own manor, Perfikot took a shower, changed clothes, and lay back on the bed.
However, she did not return above ground but remained underground.
Nonetheless, the underground part of the manor still provided her with luxurious living conditions.
Her underground room had a floor heating system directly connected to the Central Energy Tower, providing warmth to the entire room, keeping the temperature above 10℃.
This ancient heating technology wasn't much different from the modern floor heating of the original world, but if pressed to explain, calling it a kang would be more understandable.
The main structure was building a brick foundation or simply constructing a separate space underneath the room for laying heat conduct pipes to transfer warmth.
Using it merely required lighting the boiler to heat the water, then having it deliver warmth along the heat conduct pipes into the room.