Blueprint: Passive Phase-Change Vaccine Carrier — Build and Implementation Specification

Build and implementation specification for a passive vaccine carrier holding a 6.0 kg payload in a 24.34 L chamber, using 8.0 kg of phase-change material melting at 5 °C in six panels and a hybrid wall of 20 mm vacuum insulation panel plus 30 mm polyurethane foam, with a computed hold time of 88.4 hours to 8 °C at a constant 43 °C ambient and a parts cost of US $254.53. DESIGN BLUEPRINT — SIMULATED, NOT MEASURED — NOT BUILT, NOT CLINICALLY TESTED. Blueprint for the design published as DOI 10.5281/zenodo.24108490.