WEc1: Option to base calculations on the "the month with the highest irrigation demand. The way the calculations for this credit work -- if you have a normal irrigation system, meaning one without reused stormwater capture -- it makes no difference which month is used. ETo appears on both side of the equation and disappears in the math. The percentage reduction calculated will be same regardless, even if an Annual ETo is used, which is a documentation option allowed in the Reference Guide.
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