# Hot air - Stage 1 (technology) internal name `hot-air-mk01` · tier 1 (pY science pack 1, [tier 1](https://factorio.kalzumeus.com/tier/1.md)) HTML page: https://factorio.kalzumeus.com/tech/hot-air-mk01/ ## Cost 55 units of (1 × [pY science pack 1](https://factorio.kalzumeus.com/item/py-science-pack-1.md), 2 × [Automation science pack](https://factorio.kalzumeus.com/item/automation-science-pack.md)), 45 s each. ## Requires (1) - [Coke processing - Stage 1](https://factorio.kalzumeus.com/tech/coke-mk01.md) ## Leads to (4) - [Aluminium processing - Stage 1](https://factorio.kalzumeus.com/tech/aluminium-mk01.md) - [Geothermal Power - Stage 1](https://factorio.kalzumeus.com/tech/geothermal-power-mk01.md) - [Iron processing - Stage 1](https://factorio.kalzumeus.com/tech/iron-mk01.md) - [Laboratory Equipment](https://factorio.kalzumeus.com/tech/lab-instrument.md) ## Unlocks (6 recipes) ### Empty petri dish (`hotair-empty-petri-dish`) - 3 s · tier 1 - Ingredients: 50 × [Molten glass](https://factorio.kalzumeus.com/fluid/molten-glass.md), 50 × [Hot air](https://factorio.kalzumeus.com/fluid/hot-air.md) - Results: 2 × [Empty petri dish](https://factorio.kalzumeus.com/item/empty-petri-dish.md) - Made in: Glassworks MK 01, Glassworks MK 02, Glassworks MK 03, Glassworks MK 04 - Unlocked by: [Hot air - Stage 1](https://factorio.kalzumeus.com/tech/hot-air-mk01.md) ### Glassware (`hotair-flask`) - 3 s · tier 1 - Ingredients: 4 × [Rubber stoppers](https://factorio.kalzumeus.com/item/stopper.md), 100 × [Molten glass](https://factorio.kalzumeus.com/fluid/molten-glass.md), 50 × [Hot air](https://factorio.kalzumeus.com/fluid/hot-air.md) - Results: 3 × [Glassware](https://factorio.kalzumeus.com/item/flask.md) - Made in: Glassworks MK 01, Glassworks MK 02, Glassworks MK 03, Glassworks MK 04 - Unlocked by: [Hot air - Stage 1](https://factorio.kalzumeus.com/tech/hot-air-mk01.md) ### Glass (`hotair-molten-glass`) - 3 s · tier 1 - Ingredients: 50 × [Molten glass](https://factorio.kalzumeus.com/fluid/molten-glass.md), 50 × [Hot air](https://factorio.kalzumeus.com/fluid/hot-air.md) - Results: 7 × [Glass](https://factorio.kalzumeus.com/item/glass.md) - Made in: Glassworks MK 01, Glassworks MK 02, Glassworks MK 03, Glassworks MK 04 - Unlocked by: [Hot air - Stage 1](https://factorio.kalzumeus.com/tech/hot-air-mk01.md) ### Regenerative heat exchanger (`rhe`) - 2 s · tier 1 - Ingredients: 50 × [Stone brick](https://factorio.kalzumeus.com/item/stone-brick.md), 30 × [Pipe](https://factorio.kalzumeus.com/item/pipe.md), 5 × [Boiler](https://factorio.kalzumeus.com/item/boiler.md), 5 × [Simple circuit board](https://factorio.kalzumeus.com/item/electronic-circuit.md), 20 × [Small parts](https://factorio.kalzumeus.com/item/small-parts-01.md) - Results: 1 × [Regenerative heat exchanger](https://factorio.kalzumeus.com/item/rhe.md) - Made in: Burner assembling machine MK 01, Burner assembling machine MK 02, Burner assembling machine MK 03, Automated factory MK 01, Automated factory MK 02, Automated factory MK 03, Automated factory MK 04, Character, Character (flying), Mutagenic infusion, (flying) - Unlocked by: [Hot air - Stage 1](https://factorio.kalzumeus.com/tech/hot-air-mk01.md) ### Hot air (`warm-air-1`) - 2 s · tier 1 - Ingredients: 20 × [Warm stone brick](https://factorio.kalzumeus.com/item/warm-stone-brick.md), 150 × [Pressurized air](https://factorio.kalzumeus.com/fluid/pressured-air.md) - Results: 150 × [Hot air](https://factorio.kalzumeus.com/fluid/hot-air.md), 20 × [Stone brick](https://factorio.kalzumeus.com/item/stone-brick.md) - Made in: Regenerative heat exchanger - Unlocked by: [Hot air - Stage 1](https://factorio.kalzumeus.com/tech/hot-air-mk01.md) ### Warm stone brick (`warm-stone-brick-1`) - 8 s · tier 1 - Ingredients: 5 × [Stone brick](https://factorio.kalzumeus.com/item/stone-brick.md), 100 × [Coke oven gas](https://factorio.kalzumeus.com/fluid/coke-oven-gas.md) (≥250°C) - Results: 5 × [Warm stone brick](https://factorio.kalzumeus.com/item/warm-stone-brick.md), 100 × [Coke oven gas](https://factorio.kalzumeus.com/fluid/coke-oven-gas.md) (100°C) - Made in: Regenerative heat exchanger - Unlocked by: [Hot air - Stage 1](https://factorio.kalzumeus.com/tech/hot-air-mk01.md)