Send the link below via email or IMCopy
Present to your audienceStart remote presentation
- Invited audience members will follow you as you navigate and present
- People invited to a presentation do not need a Prezi account
- This link expires 10 minutes after you close the presentation
- A maximum of 30 users can follow your presentation
- Learn more about this feature in our knowledge base article
Do you really want to delete this prezi?
Neither you, nor the coeditors you shared it with will be able to recover it again.
Make your likes visible on Facebook?
You can change this under Settings & Account at any time.
IUSS: Hospital Theatres
Transcript of IUSS: Hospital Theatres
Concepts Cleanroom Standards ISO 14644 Part 1: Classification of air cleanliness Part 2: Specifications for testing and monitoring to prove continued compliance with ISO 14644-1
Part 3: Metrology and test methods
Part 4: Design, construction and start-up
Part 5: Operations
Part 4: Design, construction
and start-up Annex A: Contamination Control
Methods Barrier Concept: Aerodynamic Effects: 1) Displacement Concept 2) Pressure differential concept High Pressure / Low Airflow Low Pressure / High Airflow High Pressure / Low Airflow
Part 3: Test Methods Cleanroom Concepts Part2: Specifications for testing and monitoring to prove continued compliance with ISO 14644-1 Part1: Classification of air cleanliness 3) Dilution (not described
in ISO 14644-4) Airborne Contamination Control Strategies SG = LOG (Cx/Cref) Standards Ventilation Rates ASHRAE vs NBR vs ISO14644 Considerations for
UDAF Design Filtration Course Filters EN, MERV or
SANS 1424:2008? SANS 1424 refers to EN779 for filter classification Fine Filters Aerosol Filters (HEPA) Importance of Pressure Cascading Quantifying
Protection Levels At 3m ceiling height
Excluding UDAF (LAF) air DIN 1946/4 - 2008 } E10-E12 Importance of
Pressure Cascading Room air change rates cannot be calculated with
contaminated air quantities.
(ie - UDAF or Infiltration air) Therefore use SANS1424 for course and fine filter classification and EN1822 for HEPA filter classification Design for "In-Operation"
Establishment Time Memarzadeh et al - 2004 "At Rest" Conditions do not reflect real performance Most guidelines prescribe UDAF velocities of
0.2 - 0.45m/s
with increasing flows for higher levels of protection. Air Change Rates should be inversely proportional to ceiling heights! t < 20mins 1:100 (Views expressed do not necessarily reflect those of the IUSS working group) (Deryck Smith Consulting Engineers) DONT REFER TO FILTER EFFICIENCY (%)