the smoke go to the room at the roof

So convection

A cone does not have convection currents

for the value of that fat bronze piping you might get more copper tubing for a water based heating system

i reckon too much smoke (more than zero) is going to end up in your lungs

I recommend this book for yall from your favourite NYAZI philosopher https://www.amazon.com/Introduction-Metaphysics-Martin-Heidegger-ebook/dp/B00KMUWRSQ

You cannot even get bronze pipe

the smoke goes to the separate room at the top..
not into the living room

maybe it's just bronze-aged

copper pipe then?

There are issues with thick copper pipes hydraulically

copper is expensive, you don't need the duct to be very heat-conductive

idea was to use a pocked of smoke for insulation

some other material then...

Any pipe with diameter over say 9 inches is going to be per stressed reinforced concrete

the idea was the pipes spread heat

Or pvc but not for hot water

Fat pipes have all sorts of problems

https://youtu.be/CxKMeLuzXhA

I have hot air pipes in my walls

Especially when the water is heated

in real

i'd think about a water-based heat distribution

copper pipes can be soldered real easy

"real easy"

but it's doable

in real life.. I have a metal pipe system with hot air
in my house

You cannot run the hot air through the ground and have it retain heat

That’s not how it works, it has very low specific heat

It’ll radiate

you could build earthen spiral around the house and let it be the exhaust

can you made the heat radiate inside?

there's hot tubs on that basis

Also you’re pumping hot air down

you could isolate the outside

Which is another bad idea

then heat is trapped

you could build one wall out of dried africans

This thing is incredibly crude and still riddled with flaws

the spiralling thing always goes up

earthern spiral around the house??
below the house?