The best replacement for air purifier is humidifier.

The best alternatives to air purifier are rated as following:
★★★★★  humidifier
★★★★★  dehumidifier
★★★  ionizer
★★  air cleaner
★★  air filter
★  air humidifier
★  air conditioner
★  air sanitizer
★  furnace filter
★  air washer
★  air scrubber
  hepa
  air ionizer
  air exchanger
  ozone generator
  allergen remover
  ionic breeze
  hepa filter
  humidifier which is better
  sharper image
  filter
  humidifier allergies
  ion generator
  air ionizor

Your alternative for air purifier is not listed? Suggest!
Speaking about air purifier, one probably shouldn't forget about humidifier.

Other search terms related to air purifier and their ratings are:
★★★★★ humidifier
★★★★ hepa filter
★★ heater
★ hepa
★ dehumidifier
★ aircon
You have in mind a companion for air purifier and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of air purifier in all years. Click on graph for more.
air purifier
humidifier
dehumidifier