infection control guidelines for dentists

I have a question in regards to aerosols generated in the dental office from hand-pieces and ultrasonic devices. Dental evacuation systems differ in offices. Some suction systems have very low air flow rates while other offices have high air flow rates (cubic ft per minute). My question is are there any studies which have determined what level of flow rate the dental suction system should be in order to remove the aerosols adequately during procedures? I know many hygienists do no use HV at all when using ultrasonic devices. the CDC has come out and said that a saliva ejector (or LV) is NOT effective in aerosol reduction and is not to be used for Ultrasonic therapy. Only HV suction should be used. Well, if the HV flow rate is really low, one may think they compliant because they are using HVE but in reality, it could be as low as a saliva ejector in performance. This is HUGE! and should be looked at and addressed carefully especially for large clinics with many ultrasonic devices or hand pieces being used! When I contacted a major manufacturer of dental Vacuum systems, they only have the Power or strength of the motor listed which measures inches of mercury pulled. This is totally different than measuring airflow rate of the vacuum systems and I think most dentists and sales manufacturers have the two confused. I would love to hear your thoughts or if you can give me any information on this issue.
Thank you very much.
Laura