![]() Just to keep you confused, I have never heard owners of either CV or Oneida be unhappy or identify a major flaw. My single stage bag, then converted to media filters, was a total waste of money as I still had to buy the CV and re-duct a third time. CV has an option for a slightly larger impellor.Īgain, there is nothing more expensive than buying the wrong tool. To split the flow you use a "Y" and gates. They would likely be different, but which best meets your requirements is an unknown. Oneida is fully respectable, but they are in competition! ( notice the CV is not in their comparison chart), but it is a 5 HP) You would have to hook both units up on a representation of your ductwork and tools and measure the airflow and lift. Nothing against them, but there are so many ways to tell the truth, but tell a different story it is hard to compare on paper. I kind of doubt the 5 HP CV is not as strong as the 3 HP Oneida. I have not seen how Harvey deals with these issues, but they claim lower noise. How you duct corners, junctions, gates and basically everything in the flow is implemented. CV is not the best in how their plastic is overlapped. ( not seen one on a DC) Good attention to every edge and transition. Things like carefully spaced notches on the impellor so the trailing edge vortices harmonics to not complement. You can muffle by restriction or by absorption. Mufflers, regardless of technology and all the ads for magic hot rod mufflers, reduce the efficiency. There ate two ways to make the system quieter. Mine sits in a corner with hard walls all around. Now, as I know a bit about acoustics ( built high end loudspeakers for many years) I do intent to attack the noise level. A rating can play games depending on the weighting scale. A pure dB level as advertised is not really relevant. If a DIY, or if you have a single stage, grab it!Įar muffs loud and there is a wall between me and the DC. ![]() There is a super DD on the forum for sale now. ( FWIW, I own a CV 1500 and use his mini cyclone on my vac, so I am not picking on him, just that it is actually a very complicated fluid dynamics question and simple chart answers just by definition can't be very good. Bill's data is probably the best out there, but it still assumes way too much. The above table uses some magic unknown blowers. ![]() But even that is only a rough estimate depending on the shape of the inlet as velocity will vary across the diameter.Ī 30 micron bag is a filter to keep floor sweepings contained and to high power the DEADLY fine dust into your air where you are sure to breath them. The ONLY way to judge is to measure with an aerometer. So, a single stage is basically worthless so the question is mute. Down right BS usually.īrand new, maybe, but a single stage will clog the HEPA filter with the first cut and the performance goes off a cliff. ![]() Publishes specs are to be considered advertising at best. ![]()
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