Blast Furnace

using high temperature and a large air flow, the blast furnace is the perfect addition to an industrial settlement.
large and grandiose, it is able to process high quantities of iron ore into iron with the aid of a refined fuel (coke or charcoal).
(…thus sidestepping the primitive and longer ore-bloom-iron making process)
optionally, lime can also be added to the furnace to produce a higher yield.

1-6 blacksmiths will operate the furnace.
Happiness: Detraction 34 tile radius
Building footprint: 10 x 10
Production:
4 iron ore + either 2 coke or charcoal = 3-4 iron
3 iron ore + 1 lime + either 2 coke or charcoal = 3-4 iron
worktime: 7.0 workrequired: 4
the furnace requires 233 work to construct by builders,
& 55 lumber + 89 stone + 34 roof tiles + 34 iron fittings + 21 lime (material) + 5 leather