Purified air is provided, having a TVOC content of from less than 5 ppb to about 500 ppb, a Biologicals content of from less than 1 CFU/M3 to 150 CFU/M3 and a Particulate content of from about 1,000 0.3 μm particles per ft3 to about 50,000 0.3 μm particles per ft3, or from about 600 0.5 μm particles per ft3 to about 500,000 0.5 μm particles per ft3.