The best replacement for chimney is flue.

The best alternatives to chimney are rated as following:
★★★★★  flue
★★★★  power vent
★★★  direct vent
★★★  stack
★★  smokestack
★★  fireplace
★★  scissortail
★★  chimley
★  exhaust fans
★  chimney
★  stove pipe
★  exhaust fan
★  wood chimney
★  metal chimney
  electric starter
  vent
  8 chimney
  lighter fluid

Your alternative for chimney is not listed? Suggest!
Speaking about chimney, one probably shouldn't forget about hood.

Other search terms related to chimney and their ratings are:
★★★★★ hood
★★★★★ fireplace
★★★★ flue
★★★ multiple fireplaces
★★★ two fireplaces
★ stove
★ hob
★ pellet stove
★ santa
★ gas stove
You have in mind a companion for chimney and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of chimney in all years. Click on graph for more.
chimney
flue
power vent