The best replacement for window unit is central air.

The best alternatives to window unit are rated as following:
★★★★★  central air
★★★★  portable air conditioner
★★★  portable ac
★★  mini split
★  central unit
★  split system
★  wall unit
★  split unit
★  central ac
  central air conditioning

Your alternative for window unit is not listed? Suggest!
Speaking about window unit, one probably shouldn't forget about ac and heat.

Other search terms related to window unit and their ratings are:
★★★★★ ac and heat
★★ air conditioning and heat
★ heat and air conditioner
You have in mind a companion for window unit and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of window unit in all years. Click on graph for more.
window unit
central air
portable air conditioner