Most of the ideas are on water cleanliness at around 22%. This is quite logical since producing clean and safe water is the fundamental function of the rainwater harvesting system.

Besides, 15.6% of design ideas are general, such as easy installation, easy maintenance, etc. 

Next, 12.5% of design ideas are on costing, where low manufacturing and installation cost are targeted to achieve the highest ROI.

Besides, 12.5% of design ideas are regarding the environment, such as using environmentally friendly materials. 

Next, 9.4% of design ideas are on storage. The rainwater harvesting system is designed to accommodate as large amounts of water stored as possible to cater to the customer’s daily needs.

Lastly, 6.3% of the design ideas are on waste management, efficiency and location.