Summer Sourdough Crushed Ice & Water Temp Chart for a Hot 90 Degree (90°F / 32°C) Kitchen — Spiral Mixer (76°F Artisan DDT)
4-factor Desired Dough Temperature (DDT) and 80 cal/g latent heat crushed-ice calculation for hitting 76°F dough in a hot 90°F room.
A 90 degrees (32.2°C) kitchen demands careful water temperature discipline. With spiral mixer (76°f artisan ddt) generating +18°F and every ingredient starting at 90 degrees, the 4-factor DDT equation resolves to 16°F (-8.9°C) for the mix water if you want a 76°F (24.4°C) final dough. Substituting 114g of the 350g with crushed ice and keeping 236g of 78°F liquid water lands the dough on 76°F, because melting ice absorbs 80 calories per gram.
- Required Water Temp
- 16°F (-8.9°C)To hit 76°F DDT in 90°F room
- 350g Batch Ice Split
- 114g Ice / 236g WBased on 78°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
DDT Reference for 90°F Kitchens — Spiral Mixer (76°F Artisan DDT) Water & Ice Split
The 18°F friction allowance for spiral mixer (76°f artisan ddt) is already inside every target water temperature on this table.
| Recipe Water | Target Water Temp | Ice to Add | Water to Add (@ 78°F) | Dough Temp Achieved |
|---|---|---|---|---|
| [Exact Target]: 350g total water | mix at 16°F | substitute 114g ice | keep 236g warm water | friction +18°F absorbed |
| Alt Line A: 400g total water | mix at 16°F | substitute 131g ice | keep 269g warm water | friction +18°F absorbed |
| Alt Line B: 300g total water | mix at 16°F | substitute 98g ice | keep 202g warm water | friction +18°F absorbed |
| Alt Line C: 500g total water | mix at 16°F | substitute 163g ice | keep 337g warm water | friction +18°F absorbed |
| Alt Line D: 250g total water | mix at 16°F | substitute 82g ice | keep 168g warm water | friction +18°F absorbed |
On-Bench Hydration & Fermentation Adjuster
Modify base flour mass, levain inoculation, or ambient kitchen temperature below to recalculate from this 16°F (-8.9°C) baseline.
Baking Sourdough in a Hot 90°F Room: Why You Need 16°F Water (114g Ice)
Latent heat of fusion is why the cooling arithmetic is not linear. Replacing 114g of the 350g of water with crushed ice removes not merely 114g × 1 cal/g of sensible heat, but 114g × 80 cal/g of phase-change heat, which is what allows a 32.2°C (32.2°C) room to be cooled into a 76°F dough.
The recipe's own water temperature is not the mix water temperature. If your recipe specifies water at 90°F because it was written for a 68°F kitchen, that number has to be re-solved for this 90°F (32.2°C) room and for the +18°F that spiral mixer (76°f artisan ddt) generates.
Thermal Control Protocol for Spiral Mixer (76°F Artisan DDT) in a 90°F Room
- Start the Night Before: In a 90°F (32.2°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 16°F (-8.9°C) water ready before you open the flour bag — once the flour is wet the temperature negotiation is over.
- Blend Ice and Water: Stir 114g of crushed ice into 236g of 78°F faucet water until the slush is uniform, then pour over the flour.
- Record and Repeat: Note the final probe reading alongside the 90°F (32.2°C) room temperature so the next bake is a copy rather than a calculation.
Common Scaling & Troubleshooting Questions (16°F (-8.9°C))
How much colder is the water than the room in this 90°F (32.2°C) kitchen?
74°F below the room temperature of 90°F. That gap is the entire thermal load that 18°F of spiral mixer (76°f artisan ddt) friction and 90°F ingredients impose on the mix water.
Will the dough temperature change if I scale the recipe?
No. The 4-factor equation is a temperature balance, not a mass balance, so doubling the flour and water keeps the same 16°F target — but you must double the ice too, from 114g to 228g.
Can I mix the ice directly into the flour?
Yes, and it is often the better technique. Mixing 114g of crushed ice into the 236g of water and flour together chills the mass faster than adding cold water to warm flour, and the 80 cal/g phase change is fully captured.