Inzonex
Evidence guide

Prepare for ESOS phase 4

The phase 4 qualification date is 31 December 2026. The compliance notification deadline is 5 December 2027.

Start with the evidenceAll reporting guides
01

Check qualification

Apply the current large-undertaking and corporate-group tests using the position at the qualification date.

02

Calculate total and significant energy consumption

Record buildings, industrial processes, transport and other energy uses. Follow the current guidance for the significant-energy-consumption threshold.

Inzonex removable modular insulation on industrial equipment
Equipment heat loss

Measure exposed hot surfaces

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.

  • Design target: surface temperature at or below 45 °C, subject to the application and design review
  • Claimed heat-loss reduction: up to 96%, subject to the measured boundary and insulation specification
  • Removable construction for inspection and maintenance access
  • Calculation record available for the selected equipment and operating conditions

Do not add a calculated reduction to an emissions report until the reporting boundary, factor, implementation date and verification method have been approved.

03

Select the compliance route

Document the energy-audit and ISO 50001 coverage used. Check the current conditions for lead-assessor and report requirements.

04

Keep the evidence pack

Retain consumption data, audit scope, site visits, opportunities, action-plan review, approvals and the submitted notification.

S

Official sources

This page does not confirm qualification, compliance or the acceptability of an audit route for a participant.

Source: Inzonex Carbon Hub — inzonex.co.uk/carbon · prices dated as shown on each figure · schedule per Regulation (EU) 2023/956 · indicative analytics, not compliance advice.