Room air cleaners; portable: Performance (NT VVS 106)

  • Report #: NT VVS 106
  • Approved: May 1995
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  This Nordtest method is used to test technical performance of portable room air cleaners, to control tobacco particles in indoor air. The method measures the relative reduction by the air cleaner of particulate matter suspended in the air in a specified test chamber. The method contains tests for the following:
  1. Power consumption of the air cleaner.
  2. Air volume flow through the air cleaner.
  3. Effective cleaning rate (ECR) calculated as the flow rate of particle-free air required to produce the observed decay rate in cigarette smoke.
  4. System efficiency (SE) calculated as the observed effective cleaning rate (ECR) divided by the measured air flow rate.
  5. Effective cleaning rate ratio (ECRR) calculated as the observed effective cleaning rate (ECR) divided by the air cleaner’s power consumption.
  6. Calculated cleaning time (CCT 5%) to reduce the initial concentration of particles from 100 % down to 5 % with reference to 50 m3 test chamber.
  7. Instructive measurement of ozone (O3 ) production.
The sound level of the air cleaner is not measured. The user is often in a better position to evaluate whether the sound level is acceptable or not. It is, on the other hand, much harder for the user to evaluate how effectively the air cleaner cleans the air of tobacco particles. The size of air cleaners is limited to 500 m3/h through the air cleaner, with reference to a 50 m3 test chamber.  
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