Guidance
CHPQA guidance note 25: Determination of CHP qualifying fuel input
Guidance on how to determine CHP qualifying fuel input.
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A CHP scheme must achieve a minimum (threshold) power efficiency of 20% for all of its fuel inputs to be considered Good Quality CHP.
Schemes that fail to achieve the power efficiency threshold must calculate CHP qualifying fuel input (CHP QFI). This is the fuel input that would have achieved the power efficiency threshold.
Updates to this page
Published 1 September 2021
Last updated 26 March 2026
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Updated 2026 to align with the CHPQA Portal now hosted on GOV.UK.
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First published.