A short answer, followed by the source guide and related questions.
Start with the largest verified loss that can be corrected without disrupting safe operation. Record the baseline, implementation cost, expected saving, measurement method and operational constraints before ranking measures.
This answer is taken from Assess Industrial Decarbonisation Measures. Use the full guide for scope, assumptions and cited sources.
Use measured surface area, temperature and operating hours to calculate heat loss from boilers, kilns, heat exchangers, valves and pipework. Inzonex supplies removable modular insulation for equipment that requires maintenance access.
Do not add a calculated reduction to an emissions report until the reporting boundary, factor, implementation date and verification method have been approved.