The best replacement for water cooling is air cooling.

The best alternatives to water cooling are rated as following:
★★★★★  air cooling
★★  fan
★  heat pipe
★  fan cooling
★  air
★  oil cooling
★  heatsink
★  fans
★  closed loop
★  noctua nh-d14
★  cpu fan
  phase change
  heatpipe
  heat sink
  liquid cooling
  cpu air cooling
  h100
  raw water cooling
  fresh water cooling

Your alternative for water cooling is not listed? Suggest!
Speaking about water cooling, one probably shouldn't forget about peltier.

Other search terms related to water cooling and their ratings are:
★★★★★ peltier
★★★ tec
★★ antec 1200
★ haf x
haf 932
silverstone tj07
You have in mind a companion for water cooling and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of water cooling in all years. Click on graph for more.
water cooling
air cooling
fan