A serious wash for cleaner clothes, even delicates: PowerFoam. At the start of each cycle, water, air, and detergent combine to form a deep-cleaning foam, which increases cleaning power by distributing detergent more thoroughly. It works as well in cold water as in warm.
We washed loads of laundry containing swatches stained with wine, blood, and ring around the collar, using the washer's normal cycle with warm water. We checked for cleaning, energy and water efficiency, and gentleness in the Samsung WF520ABP with PowerFoam, $1,400. We repeated the tests with the washer's Eco-cold cycle, which uses cold water. Then we compared the results with the those of the Samsung WF330AN, $800, without PowerFoam.
PowerFoam was a washout. The Samsung with PowerFoam didn't wash as well with cold water as it did with warm. And the Samsung WF330AN cleaned just as well. Both scored Very Good for washing, Excellent for efficiency, and Good for gentleness. Save yourself $600 or more by choosing the Kenmore 4027, LG WM2050C[W], GE WCVH6800J[WW], Whirlpool WFW9050X[W], or Frigidaire Gallery GLTF2940F[S]. Those front-loaders are CR Best Buys.