I don't understand the question. Warm water vs cold water for what? For laundry, it depends on what you're washing. I've been taught use hot for whites and warm or cold for colors. For drinking, it depends on when you're drinking it. If you've just exercised or been working in the heat, warm water is better because drinking cold water can cause stomach cramps. So as you can see, the answer depends on what the water is being used for.