Summer Sourdough Crushed Ice & Water Temp Chart for a Hot 80 Degree (80°F / 27°C) Kitchen — Spiral Mixer (74°F Artisan DDT)
4-factor Desired Dough Temperature (DDT) and 80 cal/g latent heat crushed-ice calculation for hitting 74°F dough in a hot 80°F room.
In a 80°F (26.7°C) kitchen (assuming flour and levain are also at 80°F) with Spiral Mixer (74°F Artisan DDT) (+18°F mechanical friction), the 4-factor DDT equation [4 × 74°F − (80 + 80 + 80 + 18)] requires a theoretical mix water temperature of 38°F (3.3°C). Because 38°F is colder than 76°F tap water, use the 80 cal/g latent heat of fusion formula: for a 350g water batch, mix 71g of finely crushed ice with 279g of tap water.
- Required Water Temp
- 38°F (3.3°C)To hit 74°F DDT in 80°F room
- 350g Batch Ice Split
- 71g Ice / 279g WBased on 76°F tap water & 80 cal/g latent heat
- Mixer Friction Factor
- +18°FSpiral Mixer
- Target Final Dough Temp
- 74°F (23.3°C)Locks fermentation clock & protease rate
4-Factor DDT Table: 80°F Room, 74°F Target, Spiral Mixer (74°F Artisan DDT)
Calculated using 4-factor calorimetry and latent heat of fusion (144 BTU/lb / 80 cal/g) with 76°F tap water.
| Total Recipe Water | Theoretical Water Temp | Crushed Ice to Weigh | Tap Water (@ 76°F) | Resulting Final Dough Temp |
|---|---|---|---|---|
| 350g water (80°F / +18°F) [Baseline] | 38°F (3.3°C) | 71g crushed ice | 279g tap water (@ 76°F) | 74°F (23.3°C) final dough |
| 300g water (80°F / +18°F) Down 50g | 38°F (3.3°C) | 61g crushed ice | 239g tap water (@ 76°F) | 74°F (23.3°C) final dough |
| 400g water (80°F / +18°F) Up 50g | 38°F (3.3°C) | 81g crushed ice | 319g tap water (@ 76°F) | 74°F (23.3°C) final dough |
| 250g water (80°F / +18°F) Down 100g | 38°F (3.3°C) | 51g crushed ice | 199g tap water (@ 76°F) | 74°F (23.3°C) final dough |
| 500g water (80°F / +18°F) Up 150g | 38°F (3.3°C) | 101g crushed ice | 399g tap water (@ 76°F) | 74°F (23.3°C) final dough |
Real-Time Dough & Starter Scaling Sandbox
Scale this What Water Temp for Sourdough in a 8 specification up or down on your digital scale with zero hydration drift.
Baking Sourdough in a Hot 80°F Room: Why You Need 38°F Water (71g Ice)
The Desired Dough Temperature equation treats the dough as a single thermal mass with four contributions. For this 26.7°C (26.7°C) kitchen, three of them — room, flour and levain — are each 26.7°C, and the fourth is the +18°F that spiral mixer (74°f artisan ddt) adds through shear. Solving for the water temperature is the only way to hit 74°F exactly.
Humidity shifts the effective room temperature slightly. A dry 26.7°C (80°F) day pulls moisture out of the dough surface and cools it a little, so a humid morning may want half a degree less cold water than the table suggests.
Thermal Control Protocol for Spiral Mixer (74°F Artisan DDT) in a 80°F Room
- Weigh the Full Water Load: For a 350g batch you need 279g of liquid water plus 71g of crushed ice. Set the scale up before you touch the flour.
- Chill the Water: Add the 71g of ice to the 76°F tap water and wait until the melt is complete so the temperature is stable when the flour arrives.
- Mix in Spiral Mixer (74°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 74°F: Probe the finished dough immediately. In a 80 degrees (26.7°C) kitchen the reading should land on 74°F ± 1°F.
Diagnostic Answers: What Water Temp for Sourdough in a 80°F (27°
Can I mix the ice directly into the flour?
Yes, and it is often the better technique. Mixing 71g of crushed ice into the 279g 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.
What is the DDT formula for a 80 degrees kitchen using Spiral Mixer (74°F Artisan DDT)?
Target water temperature = (4 × 74°F) − (80 degrees room + 80 degrees flour + 80 degrees levain + 18°F friction) = 38°F (3.3°C).
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 38°F target — but you must double the ice too, from 71g to 142g.