Conversation in another section of the forum regarding extract batches and kettle losses resulted in some improvements to the water requirements section for extract and partial mash recipes. viewtopic.php?f=6&t=868 Batch size target (kettle or fermentor) which was previously available only for All Grain and BIAB recipes will now be available for extract and partial mash recipes. In addition, support for kettle dead space is added for extract/partial mash recipes in the water requirements section. Note that most extract brewers do a partial boil and then top off, making this whole issue is moot. However, the system implicitly assumed that kettle losses (kettle dead space, misc losses, and hops absorption) would be minimal for these types of recipes. Those kettle losses are not captured by the efficiency number, and thus the OG would be higher in the calculator than in reality. To solve this, the water requirements section will now show a warning if the provided equipment profile has more than 2% kettle losses for the extract/pm batch in fermentor mode. The system also assumes that extract/pm batches in batch target mode 'kettle' are full wort boils. Kettle losses will correctly factor into the calculated OG in that scenario.