CHPQA guidance note 29: Alternative fuels - energy inputs
Outline of fuel energy inputs for alternative fuels.
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For Combined Heat and Power Quality Assurance (CHPQA) all fuel energy inputs must be based on actual gross calorific value (GCV) in the as-fired condition.
Since determination of calorific value (CV) in the laboratory is normally based on dry fuel, knowledge of the moisture content of the fuel as fired is also required.
Updates to this page
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Updated 2026 to align with the CHPQA Portal now hosted on GOV.UK.
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First published.