Welcome aboard Ozzy and Craigy
Ozzy, you have come to the right place to learn what efficiency is really all about. Here are two quick things for you. There are two major two types of efficiency, kettle efficiency and fermentor efficiency so the first thing (which no one does on other forums) is to state which efficiency you have measured. Kettle efficiency is the most useful number to work with but a lot of software asks you to work off fermentor efficiency which muddies the waters a lot.
The second thing is that kettle efficiency (and fermentor efficiency) should not be constant although you would have been lead to believe that they are. A low gravity beer is actually more efficient than a high gravity beer. So if the first brew you did was a 1.050, the second a 1.055, the third a 1.060 and the fourth a 1.065 gravity brew then you should notice your 'efficiency' dropping over those brews.
Anyway, to make all this stuff easy to master, we developed
the BIABacus which estimates things like evaporation rates and efficiencies for you. Take your time to have a look at it. Don't be scared off at a first glance as it is a lot easier than it initially looks.
Craigy, we are sending some hot weather your way
,
PP
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