Fuel (≈€40 for gas) plus carbon (€15 at the 2034 payable share) — efficiency projects should be screened at the combined number, not the fuel price alone.
From our guide: CO2 Cost per MWh — 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: