Explanations of the boiler data

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 2001 Appendix D (clause D1.3), "combi" (clause D1.6), or "CPSU" (clause D1.13/14).

Condensing
Either "non-condensing" or "condensing" (see SAP 2001 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.

Energy efficiency band
The energy efficiency band, determined by the range in which the SEDBUK efficiency value lies. See page describing energy efficiency bands for explanation. This will be blank if the SEDBUK figure is unknown (ie; if efficiency category is not "SEDBUK").

SAP seasonal efficiency
Seasonal efficiency for use in SAP, expressed as a percentage and rounded to the nearest 0.1%. This will be obtained by one of the methods defined as the efficiency category.

Efficiency category
Category of SAP efficiency, which will be one of "SEDBUK" (see separate page for explanation), "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 2001 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.