Considering the information provided above, we tested two
kitchen range hoods at four flow rates: 100 m3/h (Hood A), 170 m3/
h (Hood B), 370 m3/h (Hood B), and 680 m3/h (Hood B). The two
range hoods were installed at the same height (46 cm) above the
stovetop. Both hoods were tested with grease screens attached. The
air captured by the range hood fan was exhausted out of the building
without recirculation. Three to six tests were conducted at each test
condition:stovetop burners or oven; burner position, and flow rate.
The experiments with the stovetop burner and oven were performed
without any food cooking, though the stovetop burner tests were
done with boiling 0.75 L of water in a pot. For each of the tests, the
gas stovetop burner or oven was started simultaneously with the exhaust
fan. During the tests, the stovetop burner was turned on for
15 min to 20 min and the gas oven was on for 1 h. The average natural
gas flow rate was 4.2 L/min for the stovetop burner while it ranged
between 0 L/min and 7.0 L/min for the gas oven at a setting of