Um, on this occasion, strictly speaking, WaterDrivel is actually correct.
I agree, but as waterdrivel is the only one sad and stupid enough to be that pedantic, it is immaterial.
If he was qualifed in any form of heating, especially the energy efficiency side, he would know that is what was what was being referred to
Burnerdrivel's only experience of energy efficiency is changing his Tena Lady, taking another pill and going back to bed