Ductless mini-split air conditioners offer powerful cooling without bulky window units or expensive ductwork.

Add Yahoo as a preferred source to see more of our stories on Google. A reliable air conditioner is a must-have on hot summer days. Simpler and (much!) cheaper to install than an HVAC system, a window ...

"The psychrometric tables and charts and much of the text material have previously appeared in themagazine Heating, piping and air conditioning."--Pref. "References ...

7 best portable air conditioners to keep your home cool - Move one of these portable ACs between rooms to circulate an icy breeze ...

We got our hands on multiple units and looked for models that are quiet, energy-efficient, and easy to install.