90% of the energy your washing machine uses is for heating the water. Washing in hot or warm water has become increasingly unnecessary as advances in clothes washers and laundry detergents have made it possible to get white and colored clothes perfectly clean in cold water. Except when washing out particularly tough stains or allergens such as dust mites every load of laundry done in hot water wastes energy. If you use cold water, you will not only save money, but also make your clothes last longer and prevent color bleeding.
We recently decided to sell Tide Coldwater because Consumer Reports rates it as the 3rd most effective out the dozens of detergents of all types that it tested. Our other cold water detergent is Biokleen, a powdered detergent on the top shelf in the purple box.