I don't know how LG did it - this refrigerator is the same exterior dimensions of my former one,  but its 3.5 cubic feet BIGGER on the insides.  Talk about quiet - it is almost silent.  The door-in-door feature is what sold me on the unit,  and it truly is wonderful to have my most used items within an easy reach without opening up the full door. The UVnano feature is an unexpected feature as it disinfects the water system with UV light.  I didn't think I'd find much of a use for the Craft Ice,  but have since fallen in love with them.  One perfectly spherical piece of ice fits a cocktail glass perfectly - and an instant conversation starter.