Firebird, the UK's fastest growing oil boiler brand, has introduced a new Slimline Combi to their premier Enviromax range.At just 520mm wide, the Enviromax Slimline Combi is a high efficiency SEDBUK A rated boiler which is ideally suited as a replacement for an existing standard efficiency combi. It has a slender storage tank which delivers excellent hot water performance with the minimum of energy losses and a fast recovery rate. Even the hot water pipes inside the boiler are insulated to ensure every last watt of energy is saved. The slimmer tank design and pipe insulation are designed to achieve a high efficiency rating when the new European Efficiency Directive comes into force for oil fired combi boilers.