optimizing schedules & retrofit to weather-based controls

Without metering irrigation water use you're almost certainly going to be working on an Option 2 approach. In this approach, you basically model your current irrigation regime vs a conventional regime, applying actual vs conventional filters for each variable (vegetation, irrigation system, topography, etc...). I believe the Reference Guide discusses integrating factors like schedules and weather-based controls as well, but there is ample room for documenting technologies that influence water use and adjusting the modeling accordingly. I'll say that having a knowledgeable landscape architect involved in this process is probably very worthwhile. . .

I don't feel like the above response answers the question of how to document 'weather-based controls'-there is no where to put it in the template. do you submit an alternative compliance path?

Version 3 of the credit form has a column (CE) in the design case table to input controller efficiency. Input the controller efficiency there and then I would also supply manufacturer documentation or other documentation confirming the controller efficiency value you've input in the for. For example, if the weather based control is expected to save 20% of the irrigation water, you would input 0.8 for the controller efficiency in the form and then upload manufacturer documentation confirming the assumption of a 20% savings.

Is there an example of acceptable 'manufacturers documentation' available. Thanks