A 1 ton AC releases around 20-30 liters of water in a day, which is thrown away by most people. This is distilled water (condensate) and a little filtration to clear the contaminants can make it ready for various industrial applications, the major cost would be of collection from various locations , would someone be interested to do some calculations to compare the cost with the cost of producing distilled water from other ways to evaluate the feasibility? #StartupIdeas