[jhayward]

Well, I suppose you can invent your own language, but that is no where near the industrial or scientific use of the term "energy efficiency".

A heat pump will consume 1/5th the electricity to maintain a given room temperature as compared to resistive heating, including all system losses outdoors.

That is how energy efficiency is defined. Energy consumed to create the outcome vs an alternative.

[Xarodon]

What I wrote isn't hard to understand, I'm sure you understand what I'm getting at.

If you want to be obtuse, be my guest.

P.S - I should've just used "efficiency", that is the correct word, not "energy efficiency"

[SigmundA]

You may be technically correct, but just barely, all of the energy put into a heat pump is turned into heat, not only does it move heat it also adds it own and that conversion is 100% efficient. Now a 100% of heat generated by the compressor may not make it into the space being heated but most of it is along with a bunch it pulled from the outside environment.

Honestly you are the one being obtuse. Efficiency can be measured many ways, but in the case of heating and cooling I think everyone would agree the efficiency that actually matters is energy efficiency for both economic and environmental reasons.