Summer Sourdough Crushed Ice & Water Temp Chart for a Hot 80 Degree (80°F / 27°C) Kitchen — Stand Mixer Low Speed (75°F DDT)
4-factor Desired Dough Temperature (DDT) and 80 cal/g latent heat crushed-ice calculation for hitting 75°F dough in a hot 80°F room.
In this 80 degrees (26.7°C) room, stand mixer low speed (75°f ddt) adds +8°F of mechanical friction to a dough whose flour and levain are also 80 degrees. The 4-factor Desired Dough Temperature equation therefore calls for mix water at 52°F (11.1°F) to deliver a 75°F (23.9°C) dough. There is no faucet setting that reaches 52°F here, so reach for ice: 45g finely crushed plus 305g of 76°F tap water brings the batch to 75°F through 80 cal/g of latent heat.
- Required Water Temp
- 52°F (11.1°C)To hit 75°F DDT in 80°F room
- 350g Batch Ice Split
- 45g Ice / 305g WBased on 76°F tap water & 80 cal/g latent heat
- Mixer Friction Factor
- +8°FStand Mixer Low Speed
- Target Final Dough Temp
- 75°F (23.9°C)Locks fermentation clock & protease rate
4-Factor DDT Table: 80°F Room, 75°F Target, Stand Mixer Low Speed (75°F DDT)
Sums each row to the batch water weight so the split between ice and liquid always reconciles.
| Water Load | Theoretical Temp | Crushed Ice | Tap Water | Final Dough Temp |
|---|---|---|---|---|
| Batch 250g [Anchor] | target 52°F / 11.1°C | ice 32g | liquid 218g | lands on 75°F |
| Batch 400g Quarter Batch | target 52°F / 11.1°C | ice 51g | liquid 349g | lands on 75°F |
| Batch 350g Three-Quarter Batch | target 52°F / 11.1°C | ice 45g | liquid 305g | lands on 75°F |
| Batch 300g Half Batch | target 52°F / 11.1°C | ice 38g | liquid 262g | lands on 75°F |
| Batch 500g Double Batch | target 52°F / 11.1°C | ice 64g | liquid 436g | lands on 75°F |
Interactive Desired Dough Temp (DDT) & Ice Solver Calculator
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Baking Sourdough in a Hot 80°F Room: Why You Need 52°F Water (45g Ice)
At 26.7°C (26.7°C) with stand mixer low speed (75°f ddt), the required mix water of 52°F (11.1°C) may be physically impossible from the tap. That is not an error in the arithmetic — it is a signal that the kitchen is too warm for a 75°F dough, and that thermal management must come from ice rather than from the faucet.
Humidity shifts the effective room temperature slightly. A dry 80 degrees (26.7°C) 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 Stand Mixer Low Speed (75°F DDT) in a 80°F Room
- Check for Sunlight: A 80°F (26.7 Celsius) reading taken in direct sun is unreliable — move the bowl to the work surface and re-probe before you trust the arithmetic.
- Equalise the Levain: Pull the starter out of the refrigerator and let it come toward 80°F, because the levain is a third of the 4-factor equation and a cold levain silently drags the whole dough down.
- Build the Slush: Combine 45g of finely crushed ice with 305g of tap water at 76°F and stir until no shards remain.
- Mix, Probe and Trust: Run stand mixer low speed (75°f ddt) (+8°F), then confirm the dough reads 75°F ± 1°F before the fermentation clock starts.
Frequently Asked Questions for This Desired Dough Temp (DDT) & Ice Solver Spec
How much ice do I add to 350g of bread water in a 80°F room (Stand Mixer Low Speed (75°F DDT))?
Replace 45g of water with finely crushed ice and use 305g of 76°F faucet water to hit 75°F DDT.
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 45g of crushed ice does the job in under a minute.
Should I probe the flour and levain separately?
Yes. The equation counts the flour and levain as 80°F each, and in a 80°F (26.7°C) kitchen a levain straight from the refrigerator can be 10°F cooler, which alone will miss the 75°F target.