Type Index number Status
Gas and oil fuel boiler 010171 Normal
Brand Model name Model qualifier
Grant Vortex Utility 36-46
Boiler ID*
Fuel heating oil
SAP winter seasonal efficiency (%) 87.9  
SAP summer seasonal efficiency (%) 80.1  
Seasonal efficiency when used in non-domestic buildings 93.8  
Comparative hot water efficiency (%) 58.5  
Efficiency category SEDBUK based on certified data
SAP equation used 201  
Output power (kW) 46.0  
Main type regular
Condensing yes  
Integral PFGHRD no  
Flue type room-sealed  
Fan assisted yes  
Ignition no  
Burner control on-off  
Mounting position floor  
Exposure rating indoor only  
Original manufacturer name Grant Engineering (UK)
Current manufacturer name Grant Engineering (UK)
Manufacturer address Hopton House
Hopton Industrial Estate
SN10 2EU
Manufacturer phone 01380 736920
Manufacturer website www.grantuk.com
First year of manufacture 2004  
Final year of manufacture current  
Entry updated 27/03/2012 10:12  
*This may be GC (formerly Gas Council) number for a gas boiler or OFTEC Registration number for an oil boiler, but if not available the manufacturer may have chosen another identifier marked on the boiler.


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