There's been statements made on this forum that VAN nozzles tend to be "water eaters" compared to standard fixed-arc nozzles. Since we've just switched from the standard MPR (matched precipitation ratio) nozzles to the TVAN (Toro variable arc nozzle) nozzles I decided to carefully look at the performance charts of each. Final conclusion: In some radii under specific PSI the MPR nozzles use less GPM than TVANs while under other specific PSI and radii the TVANs actually use less GPM than the MPRs. In some instances the GPM may actually flipflop between the two in the range from 90 degrees to 360 degrees nozzles in the middle of a given PSI range. At least with this particular manufacturer there seems to be differences, some slight while some greater. I did a random non-scientific and non-controlled CAD test where I took different areas and designed them with both types of nozzles and varying arcs to see what the overall zone GPM would be. It's variable but not to the extreme. So... the statement, at least as my studying of Toro spray nozzles goes, that "VANs use more water than standard nozzles" is not factual as a general statement.