ABSTRACT
Concentration ............................................................................250 10.2 Initial Evaluation: Filtration ..................................................................... 251 10.3 HVAC Evaluation ..................................................................................... 252
10.3.1 Ducted and Non-Ducted Return Air Systems ........................... 253 10.3.2 Low-Leakage, Fast-Acting Dampers ........................................ 253
10.4 Building Envelope .................................................................................... 253 10.4.1 External Filtration .....................................................................254 10.4.2 Internal Filtration ......................................................................254
