Engineering Freeze + THU Specification Lock
THU (Thermal Heating Unit, oil-based) with Therminol 55 / Dowtherm A circuit — Thermax / Thermodyne as vendors. Long-lead items: Triple-effect evaporator + MVR (14–18 week delivery). MVR mandatory from Day 1 — without it, 25.6 GJ/day deficit, plant cannot operate at design throughput.