Is this what Gus.Chong means by Konvetka AC vents? If it is, it
isn't. These ducts are not put on buses by the air con brands. I
mean, you can see that even the Dennis Lance has these, and so do
the Volgren buses. Hence, you cannot categorise these vents on
account of the air-con model.

and also 861P, a bus with Konvetka Air-Con, uses the older but
smaller air con ducts... Many of the O405s have these
present.
For 425R - 426M, 434P - 439B, 442R, nearly 90% air con ducts are
theese annoying small holes.. ..
