Table 7.2.1.

Main generation sources of indoor nanoparticles.

Chemical reaction by ozone
- Terpenes (α-pinene, limonene) – ozone reaction, formation of irritant products
Nonvolatile residues (NVRs) of droplets
- Atomization-type air humidifier and cleaner
Printers
- Satellite particles from ink-jet printer, toner-originated matters from laser printer
Combustion
- Cooking by gas stoves, cigarette smoking, incense smoking
Bioaerosols
- Virus
Outdoor sources
- Penetration of outdoor nanoparticles through windows and other house openings