British / Scottish Gas Boilers Boiler Efficiency Rating, Repair & Service Model Type Fuel Efficiency British / Scottish Gas RD1 3100 Non-Condensing Gas 78.0% British / Scottish Gas RD1 330 Non-Condensing Gas 79.4% British / Scottish Gas RD1 340 Non-Condensing Gas 78.6% British / Scottish Gas RD1 350 Non-Condensing Gas 79.6% British / Scottish Gas RD1 360 Non-Condensing Gas 78.3% British / Scottish Gas RD1 370 Non-Condensing Gas 78.5% British / Scottish Gas RD1 380 Non-Condensing Gas 78.1% British / Scottish Gas RD109 Non-Condensing Gas 79.4% British / Scottish Gas RD109 Silver Non-Condensing Gas 79.4% British / Scottish Gas RD112 Non-Condensing Gas 78.6% British / Scottish Gas RD112 Silver Non-Condensing Gas 78.6% British / Scottish Gas RD115 Non-Condensing Gas 79.6% British / Scottish Gas RD115 Silver Non-Condensing Gas 79.6% British / Scottish Gas RD118 Non-Condensing Gas 78.3% British / Scottish Gas RD118 Silver Non-Condensing Gas 78.3% British / Scottish Gas RD121 Non-Condensing Gas 78.5% British / Scottish Gas RD121 Silver Non-Condensing Gas 78.5% British / Scottish Gas RD124 Non-Condensing Gas 78.1% British / Scottish Gas RD124 Silver Non-Condensing Gas 78.1% British / Scottish Gas RD130 Non-Condensing Gas 78.0% British / Scottish Gas RD130 Silver Non-Condensing Gas 78.0% British / Scottish Gas RD2 4100 Non-Condensing Gas 78.9% British / Scottish Gas RD2 4125 Non-Condensing Gas 78.5% British / Scottish Gas RD2 440 Non-Condensing Gas 78.3% British / Scottish Gas RD2 450 Non-Condensing Gas 79.0% British / Scottish Gas RD2 460 Non-Condensing Gas 79.2% British / Scottish Gas RD2 470 Non-Condensing Gas 79.9% British / Scottish Gas RD2 480 Non-Condensing Gas 79.7% 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