Before campaign, every year. The 100-day continuous run turns each bare valve into a known, repeating loss — surveys quantify it to the euro.
From our guide: Decarbonizing Sugar — full context, charts and sources there.
Boilers, kilns, heat exchangers, valves and steam lines lose energy continuously. Inzonex makes patented (UK GB2508992.1) removable modular insulation — snap-fastened covers engineered per temperature tier, not generic off-the-shelf jackets: