Esmeralda Herrero BSc. PhD


Esmeralda Herrero graduated from University College Dublin (UCD) with a BSc in Pharmacology and completed a PhD in Microbiology in University College Dublin. Her research investigated bacterial proteases and their role in prion decontamination and was filed into a UK patent in 2015. Following her PhD, Esmeralda worked for a year as research and development scientist for a novel biotech company before her role as scientific officer in virology in airmid healthgroup.

Esmeralda has over 5 years research experience in mammalian cell culture, molecular biology, bacterial culturing, infectious assays, protein purification, protein biochemistry and laboratory management


Tristan Russell BSc. PhD


Tristan graduated from the University of Leeds with a BSc in Microbiology. During his degree, Tristan completed a one-year internship at a pharmaceutical company where he gained experience of working in an industrial laboratory. Tristan moved to Ireland in 2014 after choosing to study for a PhD at University College Dublin. The PhD research used molecular biology techniques to study infectious disease, specifically host-virus interactions. Tristan recently graduated from his PhD and joined the virology team at airmid healthgroup in the spring of 2019.  


Kevin Ellison


Kevin is in his third year at DCU where he has been studying Genetics and Cell biology. He is working in the Environmental Chambers under the supervision of Jake Behan.


Single Pass Impact Study

Description of the Test

Intra-duct single pass test method to assess the allergen/microbial removal capability of an air cleaning device. 

Products that can be tested

HVAC Air Cleaning Technologies, HVAC Filters, Furnace Filters


Schematic Diagram


  • The HVAC air clearing technology such as a furnace filter is installed in the duct. A "single pass" assessment is established by running the duct fan and setting the chamber to a "full dump" of air.
  • Test-runs are performed with the selected HVAC air clearing technology against a control. Runs are performed in triplicate with multiple data points.
  • Challenge dust is introduced in the duct, downstream of the fan and upstream of the proximal sampling station over a designated time period. Changes in microorganism or airborne allergen levels along the duct are determined by real time sampling. Sampling takes place within the duct upstream (proximal) and downstream (distal) of the product under test over a designated time period. Allergen capture is also determined.
  • Results are reported as ratios of decrease across filter and allergen capture vs allergen challenge.


Turnaround Time

4 weeks