Database listing application for boilers & Micro-CHP

SAP Product Characteristics Database (PCDB) listing applications for the following technology types (only) are processed and managed by Kiwa UK Ltd (trading as Kiwa GASTEC at CRE):

(i) boilers, fired by gas, LPG or oil

(ii) solid fuel boilers, fired by a variety of solid fuels

(iii) cooker boilers with twin burners, fired by gas, LPG or oil

(iv) micro-cogen (also known as micro-CHP), fired by gas, LPG, oil or solid fuel

All applicable test methodologies pertaining to these technology types are available in the SAP specification, see www.bre.co.uk/sap2012 (Appendix D and N).

For listing of the above technology types please complete the appropriate application form below and submit to: pcdb@kiwa.co.uk. Alternatively, please use the following address: Kiwa GASTEC at CRE, Kiwa House, Malvern View Business Park, Stella Way, Bishops Cleeve, Cheltenham GL52 7DQ. Phone: 01242 677877.

Prior to an application for listing, applicants should read the Terms and Conditions applicable to the listing of individual branded product performance data as an input to the National Calculation Methodologies for dwellings.

Ecodesign regulations: Submissions for Gas, LPG and Oil fired boilers that have an ErP (Ecodesign) label and product data fiche available should be submited with the application form.

 

Application forms (ensure you submit the latest version from below):

SAP PCDB - Gas & Oil boiler: Application Guide & Application Workbook

SAP PCDB - Solid fuel boiler application form

SAP PCDB - Cooker boiler application form

SAP PCDB - MicroCHP boiler application form

Further information

 

Background

The Seasonal Efficiency of Domestic Boilers in the UK (SEDBUK) calculation procedure was developed under the UK Government's Energy Efficiency Best Practice Programme with the co-operation of boiler manufacturers, and provides a basis for fair comparison of the energy performance of different boilers.

The SEDBUK procedure provides an estimate of the average annual efficiency achieved in typical domestic conditions, making reasonable assumptions about pattern of usage, climate, control, and other influences. It is calculated from the results of standard full-load efficiency and part-load efficiency test results and other data, whilst considering factors such as boiler type, ignition arrangement, internal store size, fuel used, and knowledge of the UK climate and typical domestic usage patterns. The procedure is specified in Appendix D of the SAP specification, see: www.bre.co.uk/sap2012.

SEDBUK was introduced in 1999 and has undergone a number of changes since then, the latest being from SEDBUK(2005) to SEDBUK(2009). Where boiler efficiency is quoted simply as "SEDBUK" it should be assumed this refers to SEDBUK(2005).

Boilers in the Product Characteristics Database remain marked as current models, even though they have become obsolete, if the manufacturer has not informed the database manager production has ceased.

Data for obsolete boilers without SEDBUK figures has not been checked to the same high standard.

For estimating annual fuel costs SEDBUK is a better guide than laboratory test results alone. It can be applied to most gas and oil domestic boilers for which data is available from tests conducted to the relevant European standards. The SEDBUK method is used in SAP. Data for boilers in current production has been provided by boiler manufacturers, who have had an opportunity to check the database entries before publication. Quoted SEDBUK efficiency figures are based on test results submitted by manufacturers and certified by an independent Notified Body (accredited for the testing of boilers to European standards). From October 2010 it is possible for SAP to take into account hot water performance test data for combination boilers.

Boiler efficiency tests are subject to measurement uncertainty. Consequently small differences in the efficiency values calculated from them are not significant and should not be relied on when comparing boilers. Statistical analysis suggests that if two boilers have SEDBUK values 3 percentage points apart then there is 95% confidence that the boiler with the higher value is more efficient.

 

Explanations of PCDB data fields held for boilers

Brand
Name of brand, as shown on the boiler.

Original name of manufacturer
Name of boiler manufacturer, or company responsible for the boiler in the UK, at the time the boiler was manufactured.

Current name of manufacturer
Current name of manufacturer, or company responsible for the boiler in the UK, which may not be the same as the original name.

Model name
Name of boiler model, as it appears on the boiler casing or leaflet of owners' instructions. For boilers that comply with EN483 this should be "the trade name of the appliance" shown on the data plate, as specified in EN483 8.1.2. If the same boiler is sold under more than one model name then separate entries for each may appear in the database.

Model qualifier
Qualifier to model name, if needed in addition to the model name to discriminate between different versions of same model.

Boiler ID
Boiler identifier, which, in conjunction with manufacturer's name, is unique for the model. It may be GC (formerly Gas Council) number for a gas boiler or OFTEC Registration number for an oil boiler, or some other unique reference chosen by the manufacturer and marked on the boiler.

First year of manufacture
First year of manufacture, if known.

Final year of manufacture
Final year of manufacture, or "current" if still in production. If no longer produced but date production ceased is unknown, then "obsolete".

Fuel
Fuel type, which will be one of "gas", "LPG", or "oil". If the same boiler may use more than one type of fuel then separate entries for each may appear in the database.

Mounting position
Boiler mounting position, which will be one of "unknown", "floor", "wall", "either floor or wall", or "back boiler". Exposure rating, which will be one of "unknown", "indoor only", or "outdoor".

Main type
Main boiler type, for the purpose of SAP efficiency calculation. It will be one of "regular" (see SAP 2009 Appendix D (clause D1.3), "combi" (clause D1.6), or "CPSU" (clause D1.13/14).

Condensing
Either "non-condensing" or "condensing" (see SAP 2009 Appendix D clause D1.2).

Flue type
Flue type, which will be one of "unknown", "open" or "room-sealed".

Fan assistance
Whether or not flue is fan assisted. It will be one of "unknown", "no fan", or "fan".

Boiler power
Output power (to water) of the boiler in kW. For boilers with SEDBUK efficiency figures this is the rated output as required for the purpose of the Boiler Efficiency Directive (Council of the European Communities Directive 92/42/EEC). If the power was declared only in BTU/hr then it will have been converted using the factor 1 BTU/hr = 0.000293 kW. If the boiler is range rated then both the lower and higher limits of the range will be given. If it is a modulating boiler then the modulating range will be given.

SAP 2005 seasonal efficiency
This is used as the annual average efficiency in SAP 2005. For boilers which have been tested for full-load efficiency and part-load efficiency and the results accepted for the database, the SAP 2005 seasonal efficiency will be SEDBUK(2005). For older boilers, where test data is not available, the SAP 2005 seasonal efficiency is a default value based on type, age, and fuel, as found in Table 4b of SAP 2005.

SAP 2009 annual efficiency
This is the best available estimate of annual average efficiency when installed in typical domestic conditions in the UK, and it is used in SAP 2009. For boilers which have been tested for full-load efficiency and part-load efficiency and the results accepted for the database, the SAP 2009 annual efficiency will be SEDBUK(2009). For older boilers, where test data is not available, the SAP 2009 annual efficiency is a default value based on type, age, and fuel, as found in Table 4b of SAP 2009.

Although the SAP 2009 annual efficiency is a reasonable estimate there will always be variations in individual buildings due to local climate, exposure, occupancy patterns, heating controls, insulation, and other factors. The SAP 2009 annual efficiency is used in SAP to determine the SAP winter seasonal efficiency and SAP summer seasonal efficiency.

SEDBUK (2005) efficiency bands
In SAP 2009 the efficiency scale, which consisted of 7 bands from A to G, was dropped in lieu of the European Union's Ecodesign regulation (811/2013) coming into force. This regulation introduces similar efficiency bands and will come into force on 26th September 2015.

SAP 2009 winter seasonal efficiency and SAP 2009 summer seasonal efficiency
In SAP 2009 the calculation of an annual efficiency value is used as an intermediate step to working out a separate winter seasonal efficiency and summer seasonal efficiency. In the winter season the boiler provides both space and water heating; in the summer it provides water heating only. For combination boilers, hot water performance test data can now be included in the calculation of winter and summer seasonal efficiency, and the database will show whether data has been supplied.

The summer seasonal efficiency should not be used to compare boilers for their water heating efficiency, as it is worked out by different methods for SAP according to boiler type and whether or not hot water test data has been included in the database. This is because the energy associated with hot water storage and rejected hot water must be treated separately from efficiency so that SAP can calculate any advantageous heat gains from them. A better guide to annual average hot water efficiency is given by the comparative hot water efficiency.

Full-load efficiency and Part-load efficiency
This is the efficiency at full- or part-load measured under closely controlled conditions and undertaken in a laboratory in accordance with a European standard test method. Although this provides valuable data to allow other efficiencies to be calculated, the results are not themselves a satisfactory guide to efficiency achieved under installed conditions. Neither can the results be used to compare one boiler with another, as different test conditions are applied according to boiler type and fuel used.

Comparative hot water efficiency
The purpose of the comparative hot water efficiency parameter is to present a fair comparison between the water heating performance of boilers of different types (both regular and combination boilers). For an explanation of the calculation procedure see Appendix D of SAP 2012 at: www.bre.co.uk/sap2012. The comparative hot water efficiency is not needed for SAP calculations, and is not the same as the result from the European test standard (EN13203) for measuring the water heating performance of gas combination boilers. If hot water performance is of particular concern then the comparative hot water efficiency can be used as a guide to annual average hot water efficiency (the SAP summer seasonal efficiency should not be used for that purpose).

Efficiency category
Category of SAP efficiency, which will be one of "SEDBUK", "SAP default" (meaning taken from SAP Table 4b), or "estimated" (for obsolete boilers only).

SAP equation used
The number of the SEDBUK equation used to calculate SAP efficiency, as defined in SAP 2009 Appendix D Tables D2.4 and D2.5. Number 0 indicates that no SEDBUK calculation has been performed. The equation number must be consistent with boiler type and other properties (whether gas/oil, instantaneous/storage/CPSU, and on-off/modulating).

Ignition
Whether or not has a permanent pilot light.

Burner control
Whether on-off or variable (variable may be either stepped or modulating).

Electrical power while boiler is firing
Average electrical power consumed while the boiler is firing, in watts. This includes fans, motors, heaters, and other electrical equipment but excludes any pump used to circulate water outside the boiler.

Electrical power while boiler is not firing
Average electrical power consumed while the boiler is not firing, in watts. This includes fans, motors, heaters, and other electrical equipment but excludes any pump used to circulate water outside the boiler.

Store type
For a storage combination boiler this will be "primary" or "secondary" according to whether the internal hot water store contains mainly primary water (heated directly by the boiler) or secondary water (heated indirectly for domestic hot water supply). It applies only to storage combination boilers and CPSUs.

Store loss in test
This will be "excluded" or "included" according to whether heat loss from the internal hot water store has been excluded or included in the efficiency tests carried out. It applies only to storage combination boilers and CPSUs.

Store volume
The total water volume (primary and secondary) of the internal hot water store in litres. It applies only to storage combination boilers and CPSUs.

Store insulation thickness
The thickness of the insulation applied to the internal hot water store, in mm. It applies only to storage combination boilers and CPSUs.

Store insulation type
The material used to insulate the internal hot water store, which will be one of "mineral wool", "polyurethane foam", or "fibreglass". It applies only to storage combination boilers and CPSUs.

Store temperature
The average temperature of the hot water in contact with the exterior walls of the internal hot water store in degrees Celsius. It applies only to storage combination boilers and CPSUs.

Store heat loss
The measured heat loss from the internal hot water store in watts. It applies only to storage combination boilers and CPSUs.