You can find out more about the requirements to qualify for watersafe in our. Propane boilers can offer efficiency levels of up to 96 percent afue (annual fuel utilization efficiency, a measure of heating efficiency) — levels that oil just can't match they use condensing and modulating technologies to extract more heat per unit of fuel and set the heating level at just the right temperature. Yes, subject.
Worcester again have the best efficiencies of the group, achieving an incredible 94% on both models! their 10 year guarantee on the 30si model is matched only by vaillant (when fitted by an accredited installer), however it is again the most expensive the baxi eco blue has the best output of the group both in heating and hot water.