It is a vertec unit with three sets of four diffusers (one in the shallow, one in the middle and one in the deep end). It was assessed by Vertec for my size and shape of lake. Not sure if it is a 1/2, 2/3/ 1 hp compressor. Does that help?
Thanks Ted.
btw- i have 3 hoses coming out of the compressor box, one to each diffuser.
