The acceptance of in-room recirculating UVGI systems with a Merv 8-11 filter is improving. The URV rating or the CADR rating can be demonstrated mathematically but, Hospital administrators want to see, feel, notice and measure the improvement of their interior spaces. My question is how can this be most effectively demonstrated? What type of test protocol and over how long should the test program run? Long period test programs must account for variations in outside environmental changes due to seasons and the coming and going of patients would alter the in-room microbial concentrations. Could a short test program be set up to allow the interior microbial environment to reach steady state based upon the CADR? What should be measured to show improvement? Should the testing be restricted to the inlet and outlet of the appliance?
This discussion is about measuring and testing efficacy of UVGI systems. If you wish to contribute to this topic, please reply here.
A new discussion on protection rate with surgical masks and N95 respirators for healthcare workers has spun off in the replies below. For ease of reference and participation, we have re-posted this as a new discussion with relevant replies here: https://www.ghdonline.org/ic/discussion/what-protection-with-surgical-masks-a.... Please use this link and click on ‘Reply” to contribute to this second discussion. Thank you.
Summary: This presentation covers:
* UVGI applications
* Hospital-acquired infections
* University & dormitory applications
* HVAC coil cleaning
* Forced air UV systems
* Relative humidity effect
This document supported the 2008 "Engineering Methods for the Control of Airborne Infections: An International Perspective" course that took place at the Center of Continuing Professional Education at Harvard School of Public Health July 14-25, 2008.
Source: Immune Building Systems, Inc.
Publication Date: July 14, 2008
Keywords: 2008 Harvard Engineering Methods Course, Engineering Controls, Harvard Airborne IC Course, Training, UVGI, UVGI Rating Value