Sourdough Water Temperature Chart for a 72 Degree (72°F / 22°C) Kitchen — Spiral Mixer (76°F Artisan DDT)
4-factor Desired Dough Temperature (DDT) and mixer friction offset (+18°F) for hitting 76°F dough in a 72°F room.
In a 72°F (22.2 Celsius) kitchen (assuming flour and levain are also at 72°F) with Spiral Mixer (76°F Artisan DDT) (+18°F mechanical friction), the 4-factor DDT equation [4 × 76°F − (72 + 72 + 72 + 18)] requires a theoretical mix water temperature of 70°F (21.1°C). Simply adjust your tap water to 70°F (21.1°C) using all 350g liquid water (0g ice needed).
- Required Water Temp
- 70°F (21.1°C)To hit 76°F DDT in 72°F room
- 350g Batch Ice Split
- 0g Ice / 350g WaterBased on 68°F tap water & 80 cal/g latent heat
- Mixer Friction Factor
- +18°FSpiral Mixer
- Target Final Dough Temp
- 76°F (24.4°C)Locks fermentation clock & protease rate
Batch-Scaled Ice & Water Chart for a 72°F Kitchen (Spiral Mixer (76°F Artisan DDT))
Assumes room, flour and levain are all at 72°F (22.2°C) — probe them before trusting the numbers.
| Recipe Water Weight | Required Mix Temp | Crushed Ice Weight | Tap Water (@ 68°F) | Achieved Dough Temp |
|---|---|---|---|---|
| 250g water (72°F / +18°F) [Anchor] | 70°F (21.1°C) | 0g (no ice needed) | 250g tap water (@ 68°F) | 76°F (24.4°C) final dough |
| 400g water (72°F / +18°F) Quarter Batch | 70°F (21.1°C) | 0g (no ice needed) | 400g tap water (@ 68°F) | 76°F (24.4°C) final dough |
| 350g water (72°F / +18°F) Three-Quarter Batch | 70°F (21.1°C) | 0g (no ice needed) | 350g tap water (@ 68°F) | 76°F (24.4°C) final dough |
| 300g water (72°F / +18°F) Half Batch | 70°F (21.1°C) | 0g (no ice needed) | 300g tap water (@ 68°F) | 76°F (24.4°C) final dough |
| 500g water (72°F / +18°F) Double Batch | 70°F (21.1°C) | 0g (no ice needed) | 500g tap water (@ 68°F) | 76°F (24.4°C) final dough |
On-Bench Hydration & Fermentation Adjuster
Modify base flour mass, levain inoculation, or ambient kitchen temperature below to recalculate from this 70°F (21.1°C) baseline.
Offsetting +18°F Mixer Friction in a 72°F (22°C) Kitchen: Target 70°F Water
Ice must be finely crushed. A 0g charge of coarse ice in a 22.2°C (72°F) kitchen melts unevenly through the mix, and the last shards can shock the wild yeast even though the bulk of the dough ends up at the correct 76°F.
Water temperature and flour temperature trade off. A 2°F cooler mix water offsets a 2°F warmer flour, but only if the correction is applied before the two meet — once the flour is wet, the system is already committed.
Thermal Control Protocol for Spiral Mixer (76°F Artisan DDT) in a 72°F Room
- Start the Night Before: In a 72°F (22.2°C) kitchen the flour will sit near room temperature overnight if you store it sealed, so re-probe it in the morning rather than trusting yesterday's reading.
- Prepare the Water Station: Get the 70°F (21.1°C) water ready before you open the flour bag — once the flour is wet the temperature negotiation is over.
- Blend Water and Flour: Pour 350g of 70°F water over the flour and mix with spiral mixer (76°f artisan ddt) to build the 76°F dough.
- Record and Repeat: Note the final probe reading alongside the 72°F (22.2°C) room temperature so the next bake is a copy rather than a calculation.
Common Scaling & Troubleshooting Questions (70°F (21.1°C))
How accurate is the 70°F figure in practice?
Within about 1°F, provided the four inputs really are 72°F room, 72°F flour, 72°F levain and +18°F friction. Probe the finished dough to confirm and adjust your next bake.
Why is my crumb gummy even though the dough looked the right temperature?
A correct 76°F dough can still bake badly if the core never reached 208°F. Check the internal temperature with a probe rather than trusting the oven dial, and remember to cool the loaf for two hours before slicing.
Do I need crushed ice or is a cold fridge fine?
Crushed ice, always. Chilling the bowl in the refrigerator removes heat far too slowly for a 350g batch; the 80 cal/g latent heat of fusion in 0g of crushed ice does the job in under a minute.