Abstract
The purpose of this research was to investigate the ventilation requirements of an exhaust hood for multiple cooking appliances. We measured capture efficiencies of exhaust hoods installed over single and multiple cooking appliances. Provided that the permissive level of capture efficiency is 90%, the ventilation rates of exhaust hoods for a fryer, noodle cooker, and IH table (single cooking appliance) were 430m^3/h, 375m^3/h, and 330m^3/h, respectively. The ventilation rates of exhaust hoods for a fryer with two IH tables and a noodle cooker with two IH tables (multiple cooking appliances) were 730m^3/h and 800m^3/h, respectively. The sum of the ventilation rates of exhaust hoods for a fryer with IH tables and a noodle cooker with IH tables were 1090m^3/h and 1035m^3/h, respectively. The sum of the ventilation rates for single appliances is higher than that measured in the case of exhaust hoods for multiple appliances. These results indicate that the capture and containment performance of exhaust hoods for multiple cooking appliances is higher than that of exhaust hoods for single cooking appliances. It suggests that the sum of the ventilation rates for single cooking appliances is the simplest way to estimate the ventilation rates for multiple appliances.
