I understand in the next year or so we have no choice but to have condensing boilers fitted only,does this mean all others non-condensing boilers will be taken off the market ? If this the case,would it be a good investment for me to buy another floor standing potterson boiler which I can still get the exact model as I'm so please with it,specially when it's still going after 23 years with very low maintence unless I'm just lucky !