<h1>Energy Star ratings shape window air conditioner pricing by raising upfront cost while lowering electricity bills and maintenance.</h1> Energy Star ratings for window air conditioners reflect Bureau of Energy Efficiency standards and indicate how much cooling an AC delivers per unit of electricity consumed. Higher-rated units generally cost more upfront because they use advanced components, smarter controls, and more efficient motors and compressors, but they can lower electricity bills, reduce maintenance, and extend service life. Choosing the right star rating depends on usage patterns, room size, budget, and local electricity tariffs, with energy efficiency affecting both purchase price and long-term ownership cost.