Combined heat and power quality assurance (CHPQA) guidance notes

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Simple guides to CHPQA

This series of short, simplified guides is aimed at those new to the programme, or who need a quick refresher on key topics.

Simple guide to the CHP Quality Assurance (CHPQA) Programme (PDF, 696 KB, 16 pages)

Simple guide to CHPQA eligibility (PDF, 299 KB, 9 pages)

Simple guide to CHPQA monitoring (PDF, 658 KB, 11 pages)

Simple guide to CHPQA uncertainty (PDF, 816 KB, 11 pages)

Simple guide to good quality CHP and the quality index (QI) value (PDF, 343 KB, 10 pages)

CHPQA guidance notes

The guidance notes help and guide applicants in completing the required forms and in carrying out self-assessment of their combined heat and power (CHP) schemes. They may be updated from time to time and the latest version of each notes and form will be available on the website.

The CHPQA Guidance Notes are structured as follows:

GN0 to GN9: Introduction
GN10 to GN16: Scheme Details and Thresholds
GN17 to GN29: CHPQA Analysis
GN30 to GN39: Treatment of Special Cases
GN40 to GN49: Uses for CHPQA
GN50: Quantifying And Justifying Useful Heat Outputs
GN60: Temporary COVID-19 Easement

Read the guidance notes in conjunction with the CHPQA Standard, which sets out definitions, criteria and methodologies for the operation of CHPQA. The guidance notes provide detailed information on how the Standard will be interpreted by government departments and agencies as well as guidance on compliance with the Standard. They include a number of worked examples.

Guidance Note	Summary
GUIDANCE NOTE 0	Introduction to the CHPQA Guidance Notes Information
GUIDANCE NOTE 1	CHPQA Application for Registration (Form F1)
GUIDANCE NOTE 2	CHP Scheme Description (Form F2) Information
GUIDANCE NOTE 2s	CHP Scheme Description (Form F2(S)) Information
GUIDANCE NOTE 3	Self-Assessment for Proposed New and Upgraded CHP Schemes (Form F3) Information
GUIDANCE NOTE 3s	Self Assessment of Proposed New CHP Schemes (Form F3(S)) Information
GUIDANCE NOTE 4	Self-Assessment for Existing Schemes (Form F4) Information
GUIDANCE NOTE 4s	Self-Assessment for Existing Schemes (Form F4(S)) Information
GUIDANCE NOTE 10	Defining Good Quality CHP Information
GUIDANCE NOTE 11	CHP Scheme Definition Information
GUIDANCE NOTE 12	CHP Scheme Description Information
GUIDANCE NOTE 13	CHP Scheme Monitoring Information
GUIDANCE NOTE 14	CHP Scheme Energy Inputs Information
GUIDANCE NOTE 15	CHP Scheme Power Outputs Information
GUIDANCE NOTE 16	CHP Scheme Heat Outputs Information
GUIDANCE NOTE 17	Uncertainty in Metered Inputs and Outputs
GUIDANCE NOTE 18	Uncertainty in Calculated Energy Inputs and Outputs
GUIDANCE NOTE 19	Adjustment of Energy Inputs and Outputs for Excessive Uncertainty
GUIDANCE NOTE 20	Indirect Determination of Energy Inputs Information
GUIDANCE NOTE 21	Indirect Determination of Heat Outputs Information
GUIDANCE NOTE 22	Indirect Determination of Mechanical Power Outputs Information
GUIDANCE NOTE 23	Correction of Bias in Inputs and Outputs Information
GUIDANCE NOTE 24	Determination of Scheme Quality Information
GUIDANCE NOTE 25	Determination of CHP Qualifying Fuel Input Information
GUIDANCE NOTE 26	Determination of CHP Qualifying Power Output Information
GUIDANCE NOTE 27	Determination of CHP Qualifying Power Capacity Information
GUIDANCE NOTE 28	The Determination of Z Ratio Information
GUIDANCE NOTE 29	Alternative Fuels - Energy Inputs
GUIDANCE NOTE 30	CHP Serving Community Heating Information
GUIDANCE NOTE 31	CHP Schemes Less Than 2MWe
GUIDANCE NOTE 41	Use of CHPQA to Obtain Exemption from CCL and Relief from Fuel Duty (Including On Supplies Subject To Carbon Price Support (CPS) Rates of CCL and Fuel Duty)
GUIDANCE NOTE 43	Use of CHPQA to Obtain Exemption from Business Rating of CHP Plant and Machinery
GUIDANCE NOTE 44 Issue 4	Use Of CHPQA To Obtain Support Under The Renewables Obligation - for Schemes that were operational and certified prior to 26 July 2012
GUIDANCE NOTE 44 Issue 5	Use Of CHPQA To Qualify For Contracts For Difference Support - for Renewable Obligation Schemes certified prior to 1 January 2016, that were not operational before 26 July 2012 and for Contracts for Difference contracts entered into before the publication of Issue 6 of this Guidance Note
GUIDANCE NOTE 44 Issue 6	Use of CHPQA in respect of the Renewables Obligation and Contracts for Difference - for Renewable Obligation Schemes not certified prior to 1 January 2016 and Contracts for Difference contracts entered into after the publication of this Guidance Note
GUIDANCE NOTE 44 Issue 7	Use of CHPQA in respect of the Renewables Obligation and Contracts for Difference - for Renewable Obligation Schemes not certified prior to 1 January 2016 and Contracts for Difference contracts entered into after the publication of this Guidance Note
GUIDANCE NOTE 50	Quantifying And Justifying Useful Heat Outputs
GUIDANCE NOTE 60	Temporary COVID-19 Easement
GUIDANCE NOTE 61	Reporting of Fiscal Benefits Gained from CHPQA Certification
Appendix 1	Example 1 - a Simple Small-Scale CHP Scheme Information
Appendix 2	Example 2 - a CCGT Scheme with Mixed Fuels Information
Appendix 3	Example 3 - Determination of Useful Heat Output by Direct Use of Gas Turbine (or Engine) Exhaust Gases
Appendix 4	Example 4 - Determination of Z-Ratio by Plant Performance Test
Generic Scheme Energy Flow Diagrams	Generic Scheme Energy Flow Diagrams
Summary of Standards	Summary of Standards
Glossary	Glossary of terms
CHPQA CHP Unit List (Specs鈥� for CHP鈥檚 <500KWe)	CHPQA Unit list allows small engine based CHP schemes (<500 kWe) to check their performance against the design performance of the relevant unit and under specified conditions to use the efficiency information in estimating the fuel input and/or heat output on their CHPQA submission.
Version Control Index	The Guidance Notes version date

Use of CHPQA to obtain Enhanced Capital Allowances

Use of CHPQA to obtain ECA

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