Using ASHRAE standards for indoor design conditions provides several benefits, including ensuring occupant comfort and health, reducing energy consumption, and improving HVAC system design and operation. ASHRAE standards provide a widely accepted and scientifically-based framework for determining indoor design conditions, taking into account factors such as climate, occupant activity, and building type. By following ASHRAE standards, designers and engineers can ensure that buildings are designed and operated to provide a comfortable and healthy indoor environment while minimizing energy consumption and environmental impact.