Costing of rainwater harvesting system for three types of houses in Seremban / Aida Liyana Ismail and Sayed Muhammad Aiman Sayed Abul Khair

Water is one of the most precious natural resources that provides moisture to the earth. However, there is still lack of clean water for many of the world’s poor. This problem is bound to get worse. Water policies in develop countries listed that RWH as a source of domestic supply. The fourth element of recycling which is rainwater can be used for general cleaning such as flushing, gardening and also washing car thus it can save money on water bills. This research is a study on the cost of Rain Water Harvesting (RWH) system for three types of houses in Seremban using wall mounted technology. The study on the design of RWH applied was done by calculating its cost and measuring the efficiency between the standard RWH which is on ground and wall mounted system. By using literature review, case study and interviews, a conclusion could be made which is that the payback period will decrease when the roof area increases and thus the cost per 1000 liters will also decrease as the rainwater catchment depends on roof area and also the system used.