Guidance

CHPQA guidance note 18: Uncertainty in calculated energy inputs and outputs

Assigning realistic uncertainties to energy input and output values and taking them into account when completing a self-assessment submission.

• From: Department for Energy Security and Net Zero
• Published: 1 September 2021
• Last updated: 26 March 2026 — See all updates

Documents

CHPQA guidance note 18: Uncertainty in calculated energy inputs and outputs

PDF, 295 KB, 6 pages

Details

Detailed guidance to enable responsible persons to:

• assign realistic uncertainties to calculated values of energy inputs and outputs as required for the completion of Scheme details in the submission journey
• take account of uncertainties in determining the power and heat efficiencies of a Scheme when completing a self-assessment submission

Published 1 September 2021

Last updated 26 March 2026 + show all updates

1. 26 March 2026

   Updated 2026 to align with the CHPQA Portal now hosted on GOV.UK.

2. 1 September 2021

   First published.