Definitions and Acronyms

Generic Definitions

Building Research Establishment

Building Research Establishment Environmental Assessment Method. A suite of environmental assessment rating tools designed, operated and owned by BRE, first launched in 1990.

Carbon dioxide
An invisible odorless gas which is the by product of energy generated from fossil fuels including gas, oil and coal. It is a significant contributor to global warming and climate change.

Communities and Local Government
UK Government Department responsible for Communities and Local Government; owners of the CSH.

See Code for Sustainable Homes

Code for Sustainable Homes
Government owned environmental assessment method for certifying and rating new homes in England. It was launched in April 2007.

Code for Sustainable Homes
(see Code for Sustainable Homes)

BREEAM Version for new homes, first launched in 2000 and now replaced in England for new dwellings by the Code. EcoHomes remains in operation for refurbished homes in the UK, and all dwellings in Scotland.

The Energy Performance Certificate records a home’s energy and CO2 emission performance rating which is calculated using SAP for dwellings. Energy Performance Certificates display the energy efficiency of a home on a scale of A-G. The most efficient homes – which should have the lowest fuel bills –  are in band A. The Certificate also shows, on a scale of A-G, the environmental impact of the home.
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An accessory or included fitting which provides a fixed amount of obstruction in a water supply. This has the effect of causing less water to flow from it than would otherwise flow from a fully open outlet.

An accessory or included fitting which only provides an obstruction in a water supply, but also has a limited ability to compensate for changing pressures within that supply helping to provide a consistent reduction in flow to particular valve (e.g. 6 litres/ minute)

The Energy Savings Trust was established by the UK government in 1993 following the Earth Summit in Rio de Janeiro. EST provides independent evidence-based policy analysis on energy efficiency, small-scale renewable technologies such as Solar PV, Small Scale Wind and Ground Source Heat Pumps and clean, low carbon transport, covering both the UK and Europe.
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Any shower, tap or bath mixer described as thermostatic has hot and cold water supplying it and has the means of keeping its water temperature stable once set without manual adjustment. To a greater or lesser extent the valve will also have the ability to gradually stop all water flowing out of the product when either the hot or cold supply is turned off.

Denotes the amount of pressure required to get water coming out of the fitting. This does not take account of any particular flow rate (which normally very low in systems operating close to this threshold) it is simply the minimum pressure required to have the fitting physically operating.

Generally accompanied by a logo, this denotes that the fitting is suitable for use in a healthcare environment. The TMV3 logo can only be displayed as a result of independent testing by water industry experts.

Generally accompanied by a logo, this denotes that the fitting is suitable for use in general domestic environments. The TMV2 Logo can only be displayed as a result of independent testing by water industry experts.

Water Regulations Advisory Scheme Approval denotes that a product has been independently tested and found to be compliant with the Water Supply (Water Fittings) Regulations and the Scottish Byelaws.


AC             Alternating Current                                                            ACoP          Approved Code of Practice
    Approved Document L1A                                                  ADE             Approved Document E

BRE          Building Research Establishment Assessment Method    BREEAM     Building Research Establishment Environment
            British Standard                                                                 BSRIA         Building Services Research and Information Ass.

CCS         Considerate Constructors Scheme                                     CFL            Compact Fluorescent Lamp
CH4          Methane                                                                              CHP            Combined Heat and Power
CIBSE      Chartered Institution of Building Services Engineers          CO2            Carbon Dioxide
CoC         Chain of Custody                                                                 Code          Code for Sustainable Homes
CPET       Central Point of Expertise on Timber                                   CSA           Canadian Standards Association
CSH         Code for Sustainable Homes

DC           Direct Current                                                                       DECC         Department for Energy & Climate Change
DEFRA    Department of Environment, Food and Rural Affairs           DER            Dwelling Emission Rate
DF            Average Daylight Factor                                                      DS              Design Stage

EMAS      Eco Management and Audit Scheme                                  EMS            Environmental Management System
EN           European Normalization                                                      EPC             Energy Performance Certificate
    Ethylene propylene Diene Monomer                                    EPIs            Environmental Performance Indicators
ESCO     Energy Services Company                                                   EST             Energy Savings Trust

FRA        Flood Risk Assessment                                                        FSC            Forest Stewardship Council

GLS        General Lighting Services                                                    GRP           Glass Reinforced Plastic
GSHP     Ground Source Heat Pumps                                                GWP           Global Warming Potential

HFCs      Hydrofluorocarbons                                                              HLP            Heat Loss Parameter

ICoP       Interim Code of Practice                                                       ISO             International Organization of Standardisation

LCA        Life Cycle Assessment                                                         LED            Light Emitting Diode
LZC        Low or Zero Carbon

MCS       Microgeneration Certification Scheme                                  MDF           Medium Density Fibreboard
MTCC     The Malaysian Timber Certification Council                         MVHR        Mechanical Ventilation with Heat Recovery

NAFRA    National Flood Risk Assessment                                        NIFA           Net Internal Floor Area
NOx         Nitrogen Oxides

O2           Oxygen                                                                                OSB           Oriented Strand Board

PCS        Post Construction Stage                                                      PEFC          Programme of Endorsement of Forest Certification
PFCs      Perfluorocarbons                                                                  PIR             Passive Infra Red (Movement Detecting Devices)
         Polyurethane                                                                        PV               Photovoltaic
PVC        Poly Vinyl Chloride

QA         Quality Assurance

RDL       Robust Details Limited                                                          RIBA          Royal Institute of British Architects

SAP       Standard Assessment Procedure                                         SBD           Secured by Design
SF6        Sulphur Hexafluoride                                                            SFI             Sustainable Forestry Initiative
HPS       High Pressure Sodium Lamp                                                SUDS        Sustainable Drainage systems
SWMP   Site Waste Management Plan

TER       Target Emission Rate                                                            TFL           Tubular Fluorescent Lamp

VOC      Volatile Organic Compound