The best replacement for windows down is air conditioning.

The best alternatives to windows down are rated as following:
★★★★★  air conditioning
★★★★  ac
★★★  air conditioner
★★  ac on
★  ac mythbusters
★  song 2
  air conditioning on
  air on
  air condition

Your alternative for windows down is not listed? Suggest!
Speaking about windows down, one probably shouldn't forget about ac on.

Other search terms related to windows down and their ratings are:
★★★★★ ac on
You have in mind a companion for windows down and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of windows down in all years. Click on graph for more.
windows down
air conditioning
ac