Local Baker Installs Thermostat Only in Backup Starter's Room; Family Rotates 'Whose Night on Couch' Schedule

The northeast bedroom in the Hargreaves household in Meridian, Idaho has maintained a stable 78°F (26.1°C) since February — a temperature its three human occupants have not experienced since the upstairs HVAC compressor failed eleven months ago and was deemed, in Derek Hargreaves's words, "non-urgent." The room belongs to his backup starters: two 100% hydration cultures classified as *L. sanfranciscensis* strain B and *L. plantarum* strain D, housed in sealed Weck jars atop a seedling heat mat with a dual-probe controller accurate to ±0.5°F. The temperature in the master bedroom — where Derek and his wife Karen sleep on alternating nights while the other takes the sectional — was 61°F at time of press. "The fermentation kinetics at 78 are just very different than at 76," Derek explained from the couch, where he had spent the previous three nights following a dispute about whether the heat mat's extension cord constituted a fire hazard. "Strain D in particular — I've documented a 14% increase in acetic acid production above 77.2. That's not nothing." Karen Hargreaves, reached by phone while at her mother's house in Boise, confirmed the extension cord is plugged into the outlet previously used by the couple's electric blanket. The family's couch rotation — Derek, Karen, and their 14-year-old daughter Mia, who lost her bedroom to the starters in November — is tracked in a Google Sheet Derek originally built to log fermentation activity. The Fermentation Log tab now sits adjacent to a second tab titled "Sleep Schedule (Provisional)," last updated March 12. | Resident | Assigned Surface | Avg. Nightly Temp (°F) | pH at 7am | |---|---|---|---| | *L. sanfranciscensis* B | Weck jar, heat mat | 78.0 | 3.6 | | *L. plantarum* D | Weck jar, heat mat | 78.1 | 3.7 | | Derek Hargreaves | Sectional, left cushion | 61.4 | N/A | | Karen Hargreaves | Sectional, right cushion | 61.1 | N/A | | Mia Hargreaves | Sectional, center (fold-out) | 59.8 | N/A | "I'm not saying anyone's comfort doesn't matter," said Derek, who maintains a second spreadsheet tracking every loaf baked since 2019. "I'm saying that strain D is performing at a level where I cannot risk a temperature interruption. The bread at Christmas — the one everyone said was the best bread they'd ever had — that was entirely D. Karen would agree if she were here." Karen did not agree. She described the bread as "fine." Mia, contacted via text, responded with a single emoji that sources close to the family characterized as depicting a face with no mouth. The thermostat itself — a Nest Learning Thermostat (4th generation, $149.99, purchased the same week the family's own unit was quoted for repair at $310) — has logged 847 hours of active heating since installation. Derek defended the procurement sequence by noting that the HVAC repair quote arrived on a Tuesday, and he had placed the Nest order the previous Friday "in a different mental context." Thermal regulation of backup starters is considered best practice when primary cultures are active and catastrophic cross-contamination is considered plausible (p < 0.05). The Hargreaves home has not experienced a contamination event. It has experienced two colds, one stomach bug, and an unresolved conversation about whether the living room counts as a bedroom for homeowner's insurance purposes. At press time, Derek had begun sourcing a second heat mat for what he described as "a promising *Leuconostoc mesenteroides* I really don't want to lose."