Saunier Duval Boilers Boiler Efficiency Rating, Repair & Service Model Type Fuel Efficiency Saunier Duval 500 30b Non-Condensing Gas 65.0% Saunier Duval 500 30c Non-Condensing Gas 65.0% Saunier Duval 500 30f Non-Condensing Gas 68.0% Saunier Duval 500 40b Non-Condensing Gas 65.0% Saunier Duval 500 40c Non-Condensing Gas 65.0% Saunier Duval 500 40f Non-Condensing Gas 68.0% Saunier Duval 500 50b Non-Condensing Gas 65.0% Saunier Duval 500 50c Non-Condensing Gas 65.0% Saunier Duval 500 50f Non-Condensing Gas 68.0% Saunier Duval 500 60b Non-Condensing Gas 65.0% Saunier Duval 500 60c Non-Condensing Gas 65.0% Saunier Duval 500 60f Non-Condensing Gas 68.0% Saunier Duval 500 80b Non-Condensing Gas 65.0% Saunier Duval 50ff/LP Non-Condensing LPG 80.1% Saunier Duval Ecosy 24E Condensing Gas 89.4% Saunier Duval Ecosy 28E Condensing Gas 89.2% Saunier Duval Ecosy SB24E Condensing Gas 89.5% Saunier Duval Ecosy SB28E Condensing Gas 89.3% Saunier Duval EnviroPlus F28E Condensing Gas 89.5% Saunier Duval EnviroPlus F28E SB Condensing Gas 89.6% Saunier Duval Envirotek F28E Condensing Gas 89.5% Saunier Duval Envirotek F28E SB Condensing Gas 89.6% Saunier Duval Isofast Condens F35e Condensing Gas 88.8% Saunier Duval Isofast F28E Non-Condensing Gas 79.4% Saunier Duval Isofast F35E Non-Condensing Gas 78.6% Saunier Duval Isomax F28E A Non-Condensing Gas 78.9% Saunier Duval Saunier Duval F30E Non-Condensing Gas 79.6% Saunier Duval Sd 235C Non-Condensing Gas 65.0% Saunier Duval Sd 623 Non-Condensing Gas 70.0% Saunier Duval SD Isotwin Condens F35 E Condensing LPG 90.2% Saunier Duval SD Thema Condens F 18 E SB Condensing LPG 89.8% Saunier Duval SD Thema Condens F 24 E Condensing LPG 89.7% Saunier Duval SD Thema Condens F 30 E Condensing LPG 89.8% Saunier Duval SD Themaplus Condens F 30 E Condensing LPG 89.8% Saunier Duval Semia Condens F24E Condensing Gas 86.1% Saunier Duval Semia Condens F30E Condensing Gas 86.1% Saunier Duval System 400 30 Non-Condensing Gas 68.0% Saunier Duval System 400 40 Non-Condensing Gas 68.0% Saunier Duval System 400 55 Non-Condensing Gas 68.0% Saunier Duval System 400 65 Non-Condensing Gas 68.0% Saunier Duval System 400 80 Non-Condensing Gas 68.0% Saunier Duval Thelia 23 Non-Condensing Gas 70.0% Saunier Duval Thelia 23E Non-Condensing Gas 70.0% Saunier Duval Thelia 30 Non-Condensing Gas 70.0% Saunier Duval Thelia SB23 Non-Condensing Gas 70.0% Saunier Duval Thelia Twin 28e Non-Condensing Gas 70.0% Saunier Duval Thema Classic F24E Non-Condensing Gas 78.3% Saunier Duval Thema Classic F24E Plus Non-Condensing Gas 78.3% Saunier Duval Thema Classic F30E Plus Non-Condensing Gas 79.6% Saunier Duval Thema Classic F30E SB Non-Condensing Gas 79.7% Saunier Duval Thema Classic F35E Non-Condensing Gas 78.6% Saunier Duval Themis 23 Non-Condensing Gas 65.0% Saunier Duval Xeon 18 HE Condensing Gas 88.6% Saunier Duval Xeon 30 HE Condensing Gas 88.7% Saunier Duval Xeon 30ff Non-Condensing Gas 79.7% Saunier Duval Xeon 30ff/LP Non-Condensing LPG 78.0% Saunier Duval Xeon 30HE LPG Condensing LPG 90.7% Saunier Duval Xeon 40ff Non-Condensing Gas 78.7% Saunier Duval Xeon 40ff/LP Non-Condensing LPG 78.0% Saunier Duval Xeon 50ff Non-Condensing Gas 78.8% Saunier Duval Xeon 60ff Non-Condensing Gas 79.4% Saunier Duval Xeon 60ff/LP Non-Condensing LPG 77.5% Saunier Duval Xeon 80 ff Non-Condensing Gas 79.4% Saunier Duval Xeon 80ff Non-Condensing Gas 76.3% Saunier Duval Xeon 80ff/LP Non-Condensing LPG 79.8% Saunier Duval Xeon Condens 18 Condensing Gas 88.6% Saunier Duval Xeon Condens 30 Condensing Gas 88.8% Saunier Duval Xeon Condens 30 LPG Condensing LPG 90.7% Saunier Duval Xeon40ff Non-Condensing Gas 75.4% Get FREE Boiler Quotes Compare prices today No obligation to buy Visit Boiler Guide to get free quotes from trustworthy heating engineers in your area. Enter postcode Get Quotes