Only as clean as the grid: at <150 g/kWh it beats gas boilers outright; on coal-heavy grids it doesn't — yet PPAs change the math.
From our guide: Electrification of heat — 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: