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About John Van Adrichem
Participant at the first Harvard School of Public Health 2 week seminar on Engineering Methods to reduce Airbourne infection.
Mechanical Engineer with creditadation by ASHRAE as Health care Facility Design Professional
Past Vice President of Engineering, L2B ENVIRONMENTAL SYSTEMS INC., Barrie Ontario Canada.
Currently PRESIDENT of "Van 'A' Engineering & Associates Ltd." New Lowell ON< Canada specializing in design and application of HVAC air systems technologies to improve residential and industrial environments with a full range of mechanical and electrical engineering consulting services.

We have designed numerous HVAC AND INDOOR AIR QUALITY SYSTEMS with installations in Hospitals, Homeless Shelters, Bakeries, and schools in Canada.

Member of ASHRAE

Harvard Airborne IC Course Participant

Role(s) / Profession(s)

  • Engineer


  • L2B Environmental Systems Inc.
    Website: Type: For-Profit Organization Country: Canada About: L2B Environmental Systems Inc is a Canadian company specializing in R&D and manufacturing of in-door air quality (IAQ) ultraviolet germicidal irradiation (UVGI) air purification products for residential and commercial applications. We provide consulting engineering services in Healthcare, Commercial and Institutional sectors offering innovative HVAC and UVGI solutions to meet or exceed today’s requirements for a safe and healthy indoor environment.

Work Location(s)

  • Canada

Population(s) Served


  • English

Recent Contributions

John Van Adrichem replied to "Bacticlean Units - Installation of UV lights at Princess Marina Hospital TB wards, Botswana"
Gobe: We met in Boston at Harvard School of Public Health Coarse . I am a professional engineer providing services in HVAC and I am a partner in an air purification products company (L2B Environmental Systems Inc.). In order to determine the overall efficiency of any UVGI appliance in your ...

John Van Adrichem started a discussion "In-Room Recirculating UVGI Air Disinfection: Measuring and testing efficacy of UVGI systems"
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 ...
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Recent Recommendations

None at this time.


July 24, 2008