Summer Sourdough Crushed Ice & Water Temp Chart for a Hot 82 Degree (82°F / 28°C) Kitchen — High-Friction Planetary Mixer (74°F DDT)
4-factor Desired Dough Temperature (DDT) and 80 cal/g latent heat crushed-ice calculation for hitting 74°F dough in a hot 82°F room.
Target a 74°F (23.3°C) dough, account for a 82 degrees (27.8°C) room plus 82 degrees flour and levain, then add the +24°F of heat that high-friction planetary mixer (74°f ddt) generates: 4 × 74°F − (82 + 82 + 82 + 24) = 26°F of mix water. Blending 96g of crushed ice with 254g of 78°F water is how you reach 26°F in this kitchen; the phase change alone strips 80 cal per gram before the water even warms.
- Required Water Temp
- 26°F (-3.3°C)To hit 74°F DDT in 82°F room
- 350g Batch Ice Split
- 96g Ice / 254g WBased on 78°F tap water & 80 cal/g latent heat
- Mixer Friction Factor
- +24°FHigh-Friction Planetary Mixer
- Target Final Dough Temp
- 74°F (23.3°C)Locks fermentation clock & protease rate
Desired Dough Temperature Grid at 82°F (27.8°C) Using High-Friction Planetary Mixer (74°F DDT)
Each row re-solves the 4-factor equation at a different batch size; the 26°F target stays constant while the ice mass scales.
| Batch Water Weight | Required Mix Temperature | Crushed Ice Weight | Liquid Water Needed | Final Dough Temperature |
|---|---|---|---|---|
| [Exact Target]: 300g total water | mix at 26°F | substitute 82g ice | keep 218g warm water | friction +24°F absorbed |
| Alt Line A: 350g total water | mix at 26°F | substitute 96g ice | keep 254g warm water | friction +24°F absorbed |
| Alt Line B: 500g total water | mix at 26°F | substitute 137g ice | keep 363g warm water | friction +24°F absorbed |
| Alt Line C: 250g total water | mix at 26°F | substitute 68g ice | keep 182g warm water | friction +24°F absorbed |
| Alt Line D: 400g total water | mix at 26°F | substitute 109g ice | keep 291g warm water | friction +24°F absorbed |
Live Parameter Solver for Summer Sourdough Crushed Ice & Water Temp
Dial in custom baker's percentages and export your adjusted 26°F (-3.3°C) formula for bake day.
Baking Sourdough in a Hot 82°F Room: Why You Need 26°F Water (96g Ice)
Ice must be finely crushed. A 96g charge of coarse ice in a 82 deg F (27.8°C) 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 74°F.
Probe the ingredients, not the plan. Room, flour and levain each carry their own temperature in a 27.8°C (82°F) kitchen, and the 26°F (-3.3°C) figure above assumes all three are at 82°F. A 3°F error in the flour alone shifts the finished dough by roughly 1°F.
Thermal Control Protocol for High-Friction Planetary Mixer (74°F DDT) in a 82°F Room
- Weigh the Full Water Load: For a 350g batch you need 254g of liquid water plus 96g of crushed ice. Set the scale up before you touch the flour.
- Chill the Water: Add the 96g of ice to the 78°F tap water and wait until the melt is complete so the temperature is stable when the flour arrives.
- Mix in High-Friction Planetary Mixer: Combine flour and water, then run the mixer for the full recommended time so the +24°F of mechanical heat is actually generated rather than assumed.
- Confirm 74°F: Probe the finished dough immediately. In a 82°F (27.8°C) kitchen the reading should land on 74°F ± 1°F.
Cereal Chemistry & Bench Execution FAQs
How much ice do I add to 350g of bread water in a 82 deg F room (High-Friction Planetary Mixer (74°F DDT))?
Replace 96g of water with finely crushed ice and use 254g of 78°F tap water to hit 74°F DDT.
What is the DDT formula for a 82°F kitchen using High-Friction Planetary Mixer?
Target water temperature = (4 × 74°F) − (82°F room + 82°F flour + 82°F levain + 24°F friction) = 26°F (-3.3°C).
How accurate is the 26°F figure in practice?
Within about 1°F, provided the four inputs really are 82°F room, 82°F flour, 82°F levain and +24°F friction. Probe the finished dough to confirm and adjust your next bake.