The best replacement for carbon filter is reverse osmosis.

The best alternatives to carbon filter are rated as following:
★★★★★  reverse osmosis
★★★★  ash catcher
★★★  ozone generator
★★★  water softener
★★★  charcoal filter
★★★  hepa filter
★★  ionizer
★★  hepa
★★  ona gel
★  scrubber
  ozone
  pollen filter
  carbon scrubber

Your alternative for carbon filter is not listed? Suggest!
Speaking about carbon filter, one probably shouldn't forget about inline fan.

Other search terms related to carbon filter and their ratings are:
★★★★★ inline fan
★★★ pc fan
★★ computer fan
★★ exhaust fan
★★ water softener
can fan
You have in mind a companion for carbon filter and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of carbon filter in all years. Click on graph for more.
carbon filter
reverse osmosis
ash catcher