Type Index number Status
Gas and oil fuel boiler 010339 Normal
Brand Model name Model qualifier
Grant Vortex Condensing Combi 36
Boiler ID*
Fuel heating oil
SAP 2009/2012 annual efficiency (%) 91.6  
SAP winter seasonal efficiency (%) 92.5  
SAP summer seasonal efficiency (%) 84.4  
Comparative hot water efficiency (%) 46.2  
SAP 2005 seasonal efficiency (%) 94.2  
Efficiency category SEDBUK based on certified data
SAP equation used 203  
Output power (kW) 36.0  
Electrical power when firing (W) 0  
Electrical power not firing (W) 0  
Main type combi
Condensing yes  
Integral PFGHRD no  
Flue type open or room-sealed  
Fan assisted yes  
Ignition no  
Burner control on-off  
Mounting position floor  
Exposure rating indoor only  
Original manufacturer name Grant Engineering
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 2005  
Final year of manufacture current  
Entry updated 23/12/2019 09:30  
*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.



Date Description
04/12/2015 Additional information regarding store detailes received and amended
23/12/2019 Values of SAP 2012 comparative hot water efficiency for storage combis have been updated.


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