Design Blueprint: Heat-Wave Survival Room — One Cooled Refuge Room per Dwelling

DESIGN BLUEPRINT — SIMULATED, NOT MEASURED — NOT BUILT. A buildable blueprint derived from the source paper 'A Heat-Wave Survival Room' (DOI 10.5281/zenodo.24108469). It specifies one cooled refuge room per dwelling (reference room 4.0 m x 4.0 m x 2.7 m, one exposed wall) as an integrated system: reflective coating and external shutter, 50 mm wall insulation, 40 kg of phase-change panels and the smallest common 2.5 kW split air conditioner (2.05 kW effective at 46 C). Envelope treatment cuts the peak load from 1,819.3 W to 801.5 W and daily sensible energy from 23.159 kWh to 13.305 kWh; daily electricity is 5.337 kWh costing US$1.60. The core package costs US$2,300, or US$4.37 per protected person per heat-wave day for three occupants; the full package (US$5,300) adds a 5.0 kWh battery and 2.0 kWp of photovoltaics riding an 8-hour daytime outage. Assembly, siting, commissioning and maintenance procedures are given, and the failure regimes are printed at full size: untreated top-floor rooms fail (2,729.5 W peak), humid nights fail (wet-bulb 30.01 C at 33 C and 80 percent relative humidity), and phase-change panels cannot refreeze on a 30 C night. All numbers are taken from the source paper or computed in the accompanying compute.py.