All You Need for Fresh Air: 3 Essential Green Plants | greenUPGRADER:
The Areca Palm (or Chrysalidocarpus lutescens) is does great air cleansing work during the day. About 4 shoulder height plants per person should do the trick.
The Mother-in-law’s Tongue (or Sansevieria trifasciata) takes over by converting CO2 to O2 at night. You want about 6 to 8 of these waist high plants per person.
The Money Plant (or Epipremnum aureum) does the job of filtering out removing Formaldehyde and other VOC’s (Volatile Organic Compounds).