Fit a window-mounted AC unit into horizontally sliding windows. Should work with casement windows, too -- at least that's what I hope!
noria-smart-air-conditioner-spring the BTU Noria air-conditioning window unit
Noria is the first window air conditioner designed entirely with you in mind.Noria was designed to address all the pain points of current window air conditioner
LG LW1217ERSM 12,000 BTU Window Air Conditioner