What is excluded from the scope of ASHRAE Standard 62.1-2022?

• A. Outdoor amphitheaters and stadiums.
• B. Outdoor air intakes for industrial plants.
• C. All laboratories regardless of materials.
• D. Spaces within dwelling units in residential occupancies, smoking areas, patient care areas not listed, and laboratories with hazardous materials.

Answer: (D)

ASHRAE 62.1-2022 sets minimum ventilation and IAQ requirements for most nonresidential spaces, but it deliberately excludes certain areas that require specialized treatment or are outside nonresidential scope. Spaces within dwelling units in residential occupancies are not covered because they fall under residential ventilation standards rather than nonresidential ones. Smoking areas are excluded because they have unique pollutant loads and may be governed by separate guidelines or local codes rather than the general nonresidential IAQ framework. Patient care areas that aren’t listed and laboratories with hazardous materials are also excluded since they need specialized considerations and often other standards or safety requirements (such as lab ventilation standards) address them. Therefore, these categories are outside the scope of ASHRAE 62.1-2022.