Particles sizes and concentrations in an experimental operation room specified for pre clinical animal research

The tests were made in a empty experimental surgical room for pre clinical animal research. The measurements were made with 3 filters efficiency : 65 %, 85 % and HEPA filter, according to ASHRAE conditions. The particle samples were taken at the upstream of the air conditioning system and on the operating table. Data collection were done the same day. The results show that the particle concentration is dominated by the smaller particles, so the use of high efficiency filtration is the best alternative.