The occupancy component is expressed in cfm per person.įor example, the minimum ventilation rate for a restaurant is 0.18 cfm/sq.ft.The design airflow per unit area is expressed in cfm per square foot.Based on air pollution research, ASHRAE has determined ideal ventilation rates for each type of building, which are presented per square foot and per occupant: The ventilation rate procedure is widely used, since it involves standardized calculations that are well-known in the HVAC industry. Ventilation Rate Procedure: The Prescriptive Approach Optimize your ventilation design and reduce energy consumption. While the VRP is based on prescriptive measures and ventilation tables, the IAQP is based on performance - delivering a ventilation system that controls air pollutants effectively. The VRP and IAQP follow different approaches to achieve a suitable ventilation level. The standard specifies a design procedure for natural ventilation, and two options for mechanical ventilation systems: the ventilation rate procedure (VRP) and the indoor air quality procedure (IAQP). The ANSI/ASHRAE Standard 62.1-2016 is called “Ventilation for Acceptable Indoor Air Quality”. ASHRAE standards cover many aspects of heating, ventilation, air conditioning and refrigeration, and building codes throughout the world use them as reference. The American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE) was founded in 1894, and is has now evolved into a global association with over 50,000 members.
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