In this video we demonstrate how Co2 levels can concentrate quickly from the respiration of the occupants inside the Cabin.
There are many reports / studies completed on Co2 concentration in Vehicles that prove with a single Occupant that the Co2 can increase to >3,000 ppm within 8.0 minutes- this is more than 3 x times the WHO (World Health Organisation) / (AIHRA) Australian Institute of Heating Refrigeration and Air- conditioning recommend.
Unacceptable Co2 concentration have proven to effect Concentration, cause Fatigue / Micro- sleeps, etc and in severe cases Acidosis.
Test Procedure: In this test our Philip Beckett demonstrated how quickly Co2 will concentrate inside a Cabin- with a single occupant. By turning off the RESPA® External Filtration Unit we simulated a blocked External Filter or situations where an Operator may switch their Air- conditioning System to Recirculation Air only (to avoid entry of contamination, high / low ambient temperatures, inefficient Air- conditioning, etc). So we only had the Recirculation Air Unit operational.
AIHRA recommend that "Exhaust Air Leakage"- fresh air displacement should be 10- 15 litres / second for each Occupant inside a Cabin. In our test the RESPA® External Filtration Unit provided >25 l /sec of Fresh Air to the Cabin for this Quality Cabin Environmental Air System design. For Cabins with more Occupants- eg Light Vehicles we provide different designs for increased air supply.
Test Results: Testing demonstrated in the Video below that:
(Ensure you click the enlarge icon on the video to expand to full screen viewing)