Optimal Plan for Equipping Residential Buildings to Accessories for Reducing Water Consumption (Case Study: Isfahan City)

Due to role of water consumption management as a main part in demand management, installing the retrofit accessories for the house fixtures, on the technical side of water consumption management, can have a significant impact on reducing urban water consumption. There is a question, however, on how Water and Wastewater Companies (WWC) can implement such approach and equip households with retrofit accessories. This article presents an optimal plan which includes the kind of accessories, target community and the way of implementation. The study hired the data for Isfahan city customers’ water consumption and prices in Iranian year 1396. According to the cost-benefit diagram for 6 packs of accessories, the optimal pack included 3 aerators, 1 shower head and 1 flush tank. Due to cost and impact of this pack on reduction of water consumption, the target community was selected from customers who have high consumptions over 2 times of consumption authorized pattern. Among 3 ways to implement this plan, distributing accessories by WWC and paying the cost by customers in installment showed shorter payback period and more feasibility in implementing the plan.