Reply To: Particle count in a room

[andrew o'sullivan]

Hi Rob sorry another question, if the return air grilles shown have a return air velocity as they have an extract of 0.219 in real life, is the best thing to do set the ruturn grilles as inlet velocity and set the magniutude to a negative?, that is what I have been doing but the particles don't seem to be escaping as they should through these outlets.