https://www.facebook.com/DuctlessAirConditioning Ductless air conditioners have been in the United States since 1980's but only just coming of age so to speak. Did you know that 94% of Japan uses ductless wall units? 84% of Europe the same. Why? Because they are extremely efficient in both heating and cooling. Next to geothermal energy, ductless heat pumps are the most efficient way to heat and cool your home.