Yes: 70%+ of electrical input is recoverable as hot water/air — frequently the largest single heat-recovery stream in light industry.
From our guide: Compressed-air optimisation — 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: