A ranking of reduction measures by cost per tonne of CO2 avoided — negative-cost measures (efficiency) on the left, expensive ones (H2, CCS) on the right. It's the standard tool for sequencing a decarbonization plan against the carbon price.
From our guide: Industrial Decarbonization — 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: