TableĀ 2

Carbon and nitrogen oxide concentrations after combustion of six brands of indirect moxa

CO2 (ppm)CO (ppb)NO (ppb)NO2 (ppb)NOx (ppb)
Blank7480.0020.0090.0080.012
A6880.0070.0510.0260.077
B6000.0060.0250.0250.058
C6470.0050.0150.0210.036
D6360.0060.0500.0310.081
E6710.0050.0190.0250041
F6530.0060.0200.0310.051
Limit10000.050.05
  • Blank refers to indoor air condition before combustion. Limit refers to upper safety threshold according to Korean environmental law. A to F represent six different brands of indirect moxa.

  • CO2, carbon dioxide; CO, carbon monoxide; NO, nitric oxide; NO2, nitrogen dioxide; NOx, nitrogen oxide; ppb, parts per billion; ppm, parts per million.