Appendix A: Abbreviations

APM Annual Performance Method

ASHP Air source heat pump

BS British Standard

BSI British Standards Institute

CHeSS Central Heating System Specifications

CHP Combined heat and power

CO2 Carbon dioxide

COP Coefficient of performance

DCLG Department for Communities and Local Government

DECC Department of Energy and Climate Change

DHW Domestic hot water

EEI Energy Efficiency Index

EER Energy efficiency ratio

EN European Norm (standard)

ESR Energy Saving Recommended

GSHP Ground source heat pump

HPER Heating plant emission rate

HVAC Heating, ventilation and air conditioning

LPG Liquified petroleum gas

PAS Publicly Available Specification

PCDB Product Characteristics Database

PSR Plant size ratio

RHI Renewable Heat Incentive

SAP Standard Assessment Procedure

SCOP Seasonal coefficient of performance

SEDBUK Seasonal Efficiency of Domestic Boilers in the UK

SEER Seasonal energy efficiency ratio

SFP Specific fan power

SI Statutory Instrument

SPEER Seasonal primary energy efficiency ratio

SPF Seasonal performance factor

TER Target carbon dioxide emission rate

TRV Thermostatic radiator valve

WSHP Water source heat pump