Indoor Air Quality in Healthcare Estates: Aspergillus – What’s required to filter it? – Including best filtration practice

Article on a paper titled ‘Filtering Airborne Aspergillosis’ by Don Donovan – Camfil Farr Ireland

Indoor air quality in hospitals

There is much written about the prevention of Nosocomial Invasive Aspergillosis, how outbreaks can happen and the effect that it can have in immune suppressed patients.

While this paper looks briefly at Aspergillous its main focus considers filtration steps to prevent airborne Aspergillus entering the hospital ventilation systems but as requested it will also consider other fungi spores in its recommendation.

Many commentators have suggested that HEPA (High Efficiency Particle Air) filters should be installed as a final stage of filtration and this has now been written into many hospital guidelines and standards. This document will review this in more detail.

In compiling this report I felt it was worthwhile taken into account the general indoor air quality and how it can be improved by the installing the optimum filter selection while at the same time taking into account the cost of energy, labour and waste disposal.

In most cases the particle size of different contaminant are known however to understand how these particles are actually filtered this document includes a section on the principles of filtration.

Over the years, many of the standards and regulations that govern air filters have been updated, and this document will review these and look at why they have changed for the better. The new standards have more emphasis now on the protecting of people’s health (IAQ) and the conservation of Energy.   At the end of this report recommendations are put forward.  READ THE FULL REPORT HERE.

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2012 CIBSE Accredited Webinar Programme launched!

Camfil Farr 2012 Webinar Programme

Camfil Farr have developed a wide range of live interactive Webinars that are CIBSE CPD accredited and last for an hour. These webinars are free to attend and will be available for viewing on-demand after the event with registration if you cannot attend.


Camfil Farr Training Academy 2012 Q1 – Webinar Programme:

Fri 2nd March 2012 at 11.00am – PrEN779:2012 – The New European Standard for Filters

Presented by: Peter Dyment, Energy Consultant Camfil Farr

This webinar introduces the New European standard for air filters (prEN779:2012) this will come into force in autumn 2012. Its purpose is to classify air filters based on their lowest filtration efficiency, also referred to as minimum efficiency (ME). The standard is an initiative that we welcome and a step towards better indoor environments. REGISTER HERE

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FACTS on the health effects of air pollution

The way we live increases our exposure to air pollution:

  • We spend close to 90% of our lives indoors
  • Indoor air can be up to 50 times more polluted than outdoor.

IAQ Quick Facts

Outdoor air pollution infiltrates into buildings. Without appropriate ventilation, it accumulates and can even react with other indoor air pollutants.

Indoor air pollution is made of outdoor air pollutants, including heating and traffic particles and gases that infiltrate into our buildings as well as chemicals emissions from building materials, DIY products, cleaning products, air fresheners, combustion particles from heating, cooking and candles, pets allergens, electronics and appliances offgasing…

Find out all the facts and references on particles, health and productivity by downloading the Camfil Farr IAQ Quick Facts PDF here.

We are highlighting the issues surrounding indoor air quality, air pollution and its effect on human health.  Please have a look around, subscribe to our feed and comment on any posts that you find interesting!  We would love to hear your thoughts.