What should I inspect when a furnace-fed machine stops?

Check the fuel supply and the machine position above the furnace. Trace the refilling belt from its fuel box to the furnace input, then compare the active heat consumers with the furnace and fuel settings in the heat plan.

What changed about standby heat?

The update removed the base heat cost of heating devices. Size the working production line around its active heat consumers instead of adding the old idle base cost.

How can heat reach other factory floors?

Place a Steam Boiler above a furnace. It converts heat into high-pressure steam with an adjustable output rate. Pipes can collect that steam into a shared header and carry it to the floors where power is needed.

Gameplay

Alchemy Factory Furnaces: Heat, Fuel and Machine Placement

Place machines above furnace heat, automate fuel input, compare heating-calculator settings, and plan around the updated idle-heat rule.

Updated September 17, 2026

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Put the working machine above the heat source

Add fuel to a furnace, then place the heat-consuming production machine above it. For automatic refilling, run a conveyor from a fuel box into the furnace input.

Open the Heating Calculator, enter your Stone Furnace and Blast Furnace counts, and add the devices that will consume heat. Match the selected fuel to the fuel supplied by your factory.

Watch the furnace setup demonstration for machine placement and a belt-fed fuel box.Playing this video connects to YouTube.

Machine settings in the Heating Calculator

Heat consumer	Heat-speed setting
Iron Smelter	9
Crucible	4
Stackable Crucible	6
Thermal Extractor	80
Paradox Crucible	1200
Kiln	15
Alembic	108
Athanor	32
Advanced Alembic	270
Advanced Athanor	360

Fuel settings for the heat plan

Fuel	Heat value
Logs	2000
Coal Ore	30000
Plank	20
Charcoal	40
Charcoal Powder	48
Coke	600
Coke Powder	660
Coal	540
Black Powder	6000
Blast Potion	24000
Panacea Potion	320000

Cold machines and changing heat demand

What should I inspect when a furnace-fed machine stops?: Check the fuel supply and the machine position above the furnace. Trace the refilling belt from its fuel box to the furnace input, then compare the active heat consumers with the furnace and fuel settings in the heat plan.
What changed about standby heat?: The update removed the base heat cost of heating devices. Size the working production line around its active heat consumers instead of adding the old idle base cost.
How can heat reach other factory floors?: Place a Steam Boiler above a furnace. It converts heat into high-pressure steam with an adjustable output rate. Pipes can collect that steam into a shared header and carry it to the floors where power is needed.

Watch how Steam Boilers feed pipes and distribute steam between floors.Playing this video connects to YouTube.