Which are the two primary compliance paths defined in ASHRAE 62.1 for establishing ventilation requirements?

• A. VRP and IAQP
• B. VRP and DCV
• C. IAQP and DCV
• D. Ventilation Rate Procedure and IAQ

Answer: (A)

ASHRAE 62.1 provides two main ways to meet ventilation requirements: a rate-based method and a performance-based IAQ method. The Ventilation Rate Procedure requires meeting minimum outdoor air flow rates for each space type and occupancy as defined in the standard. The Indoor Air Quality Procedure lets you demonstrate acceptable indoor air quality by showing that the space will meet IAQ targets for specified contaminants, which can allow lower outdoor air rates if other controls and design features ensure IAQ. Demand control ventilation is a common technique used to implement these paths, but it’s not a separate compliance route. So the two primary paths are Ventilation Rate Procedure and Indoor Air Quality Procedure.