[shagie]

Today, you'd likely do it with an under rug heater. https://cozywinters.com/shop/rug-heat.html for example.

Though, the "heating a room with a fireplace" wasn't the way it was done then.

https://solar.lowtechmagazine.com/2015/02/restoring-the-old-...

Also https://youtu.be/inzamhtroO0

> Kettle Moraine Heating & Air Conditioning installed solar panels designed to work with the brand-new Lennox systems and appliances used throughout the house. Now the owner—who bought the 10,000-square-foot historic home and updated the property with a 5,000-square-foot addition with help from Kettle Moraine—is saving a whopping $3,000 in electricity costs per year thanks to solar energy. And they’re pleased with the whole HVAC overhaul and new installation.

https://www.buildingmycastle.com/an-energy-efficient-castle/

Consider the equivalent question of "how do you heat Filoli Mansion?" When it was built, it was fireplaces and a diesel boiler.