Pharmacy, detox and dirty linen rooms in rehab facility

I always include soiled utility, but it's somewhat of a judgement call. I would make the decision based on whether there is anything volatile in the room that could end up in the air, either as a chemical, particulate, or a smell.

You may find ASHRAE-170, Ventilation of Heath Care Facilities, to be a useful standard. It recommends ventilation parameters for various health care functions. These parameters primarily address odor and infection control, but they may provide insight for handling IEQc5.

For example, the 2013 edition recommends that soiled linen and decontamination rooms be under negative pressure, with all room air exhausting directly outdoors. Therefore, if you determined that the contaminants in these rooms meet IEQc5’s criteria, you could enclose and exhaust these rooms to meet the credit requirements.

By contrast, ASHRAE-170 recommends that most types of pharmacies be under positive pressure, so IEQc5’s negative pressure differentials would be inappropriate. ASHRAE-170 sets no requirements for medication rooms, but I have seen other standards that treat them the same as pharmacies.

Some jurisdictions have adopted ASHRAE-170 or similar standards as Code. Check local regulations.