Summer Sourdough Crushed Ice & Water Temp Chart for a Hot 86 Degree (86°F / 30°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 86°F room.
Four inputs decide the temperature of your water: the 74°F target dough, a 86°F room, 86°F flour, 86°F levain, and +24°F from high-friction planetary mixer (74°f ddt). Solve 4 × 74°F − (86 + 86 + 86 + 24) and you land on 14°F (-10°C) of mix water in this 86°F (30°C) kitchen. The faucet supplies 78°F and the dough needs 14°F, so ice is the only route: weigh 118g of crushed ice and 232g of 78°F water for the 350g batch, exploiting 80 cal per gram of phase change.
- Required Water Temp
- 14°F (-10°C)To hit 74°F DDT in 86°F room
- 350g Batch Ice Split
- 118g Ice / 232g 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
Water Temperature Solver: 86°F (30°C) Room, High-Friction Planetary Mixer (74°F DDT) (+24°F)
Each row re-solves the 4-factor equation at a different batch size; the 14°F target stays constant while the ice mass scales.
| Batch Water Weight | Required Mix Temperature | Crushed Ice Weight | Liquid Water Needed | Final Dough Temperature |
|---|---|---|---|---|
| 300g recipe water — [Baseline] | 14°F theoretical | 101g finely crushed | 199g from the tap at 78°F | final 74°F / 23.3°C |
| 350g recipe water — Down 50g | 14°F theoretical | 118g finely crushed | 232g from the tap at 78°F | final 74°F / 23.3°C |
| 500g recipe water — Up 50g | 14°F theoretical | 168g finely crushed | 332g from the tap at 78°F | final 74°F / 23.3°C |
| 250g recipe water — Down 100g | 14°F theoretical | 84g finely crushed | 166g from the tap at 78°F | final 74°F / 23.3°C |
| 400g recipe water — Up 150g | 14°F theoretical | 135g finely crushed | 265g from the tap at 78°F | final 74°F / 23.3°C |
Live Parameter Solver for Summer Sourdough Crushed Ice & Water Temp
Dial in custom baker's percentages and export your adjusted 14°F (-10°C) formula for bake day.
Baking Sourdough in a Hot 86°F Room: Why You Need 14°F Water (118g Ice)
Ice must be finely crushed. A 118g charge of coarse ice in a 86°F (30°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.
Ice substitution scales with batch size, not with flour. The 118g 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 High-Friction Planetary Mixer (74°F DDT) in a 86°F Room
- Measure the Room First: Confirm the kitchen really is 86°F (30°C) with a thermometer on the counter, not on the window, because radiant sun can read several degrees warmer than the working surface.
- Temper Flour and Levain: Bring both to 86°F before mixing. Cold flour is the most common reason a 74°F target is missed in a 86°F (30°C) kitchen.
- Combine 118g Crushed Ice with 232g Tap Water: Mix the ice into the 78°F water first and let it chill completely before it touches the flour.
- Mix and Check: After high-friction planetary mixer, probe the dough — it should read 74°F (±1°F) given the +24°F friction allowance.
Cereal Chemistry & Bench Execution FAQs
What if my kitchen is warmer than 86°F on the day I bake?
Recalculate rather than adjusting by feel. Every extra degree of room temperature demands roughly one degree less from the mix water, and in a warm room the 14°F figure can drop below freezing, at which point the ice route becomes unavoidable.
Should I probe the flour and levain separately?
Yes. The equation counts the flour and levain as 86 deg F each, and in a 86 deg F (30°C) kitchen a levain straight from the refrigerator can be 10°F cooler, which alone will miss the 74°F target.
What is the DDT formula for a 86°F kitchen using High-Friction Planetary Mixer (74°F DDT)?
Target water temperature = (4 × 74°F) − (86°F room + 86°F flour + 86°F levain + 24°F friction) = 14°F (-10°C).