Summer Sourdough Crushed Ice & Water Temp Chart for a Hot 86 Degree (86°F / 30°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 86°F room.
A 30°C (86°F) kitchen demands careful water temperature discipline. With spiral mixer (76°f artisan ddt) generating +18°F and every ingredient starting at 86°F, the 4-factor DDT equation resolves to 28°F (-2.2°C) for the mix water if you want a 76°F (24.4°C) final dough. Substituting 92g of the 350g with crushed ice and keeping 258g of 78°F liquid water lands the dough on 76°F, because melting ice absorbs 80 calories per gram.
- Required Water Temp
- 28°F (-2.2°C)To hit 76°F DDT in 86°F room
- 350g Batch Ice Split
- 92g Ice / 258g 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
4-Factor DDT Table: 86°F Room, 76°F Target, Spiral Mixer (76°F Artisan DDT)
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]: 300g total water | mix at 28°F | substitute 79g ice | keep 221g warm water | friction +18°F absorbed |
| Alt Line A: 350g total water | mix at 28°F | substitute 92g ice | keep 258g warm water | friction +18°F absorbed |
| Alt Line B: 500g total water | mix at 28°F | substitute 132g ice | keep 368g warm water | friction +18°F absorbed |
| Alt Line C: 250g total water | mix at 28°F | substitute 66g ice | keep 184g warm water | friction +18°F absorbed |
| Alt Line D: 400g total water | mix at 28°F | substitute 105g ice | keep 295g warm water | friction +18°F absorbed |
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Fine-tune starter hydration between 50% stiff and 125% liquid while keeping your desired dough temp (ddt) & ice solver ratios locked.
Baking Sourdough in a Hot 86°F Room: Why You Need 28°F Water (92g Ice)
The Desired Dough Temperature equation treats the dough as a single thermal mass with four contributions. For this 86°F (30°C) kitchen, three of them — room, flour and levain — are each 86°F, and the fourth is the +18°F that spiral mixer (76°f artisan ddt) adds through shear. Solving for the water temperature is the only way to hit 76°F exactly.
Ice substitution scales with batch size, not with flour. The 92g of crushed ice quoted for 350g of water becomes proportionally larger for a bigger batch, because the same temperature deficit has to be removed from more mass.
Thermal Control Protocol for Spiral Mixer (76°F Artisan DDT) in a 86°F Room
- Weigh the Full Water Load: For a 350g batch you need 258g of liquid water plus 92g of crushed ice. Set the scale up before you touch the flour.
- Chill the Water: Add the 92g of ice to the 78°F faucet water and wait until the melt is complete so the temperature is stable when the flour arrives.
- Mix in Spiral Mixer (76°F Artisan DDT): Combine flour and water, then run the mixer for the full recommended time so the +18°F of mechanical heat is actually generated rather than assumed.
- Confirm 76°F: Probe the finished dough immediately. In a 86°F (30°C) kitchen the reading should land on 76°F ± 1°F.
Technical Q&A: Summer Sourdough Crushed Ice & Water Temp Chart
What happens if I use hot water from the kettle instead?
The dough lands above 76°F, the fermentation clock accelerates by roughly 4% per extra degree, and in a 86°F (30 Celsius) kitchen the result is typically an over-fermented loaf that collapses in the oven.
Can I mix the ice directly into the flour?
Yes, and it is often the better technique. Mixing 92g of crushed ice into the 258g 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.
Why does my dough come out warmer than 76°F in a 86°F room?
Almost always the friction term. If you used 78°F tap water instead of 28°F, the 18°F that spiral mixer (76°f artisan ddt) generates has nowhere to go, and the finished dough overshoots the target.