IoT-Based On-demand Smart Water Heating/Cooling System

IoT-Based On-demand Smart Water Heating/Cooling System

Ibrahim ALZUBAIDI, Faisal ALMUTAIRI, Anas ALSHAMMARI, Murtada ALZURI, Saad MAJRASHI, Samir EL-NAKLA, Ahmed ABUL HUSSAIN

Abstract. This paper presents the design and implementation of an Internet of Things (IoT)-based on-demand water heating and cooling system for minimizing water and energy wastage in domestic and industrial applications. The proposed system integrates temperature sensing, flow monitoring, real-time clock (RTC) scheduling, and wireless control through a mobile application. By activating the heater or cooler only when required, the system reduces energy losses and eliminates pre-use wastage of water. Experimental results demonstrate significant reduction in energy consumption and improvement in water savings compared to conventional thermostat-based systems. The proposed design offers a scalable model for smart water systems and supports sustainable resource management which aligns with Saudi Vision 2030 goals.

Keywords
IoT, On-Demand Control, Water Heating, Cooling System, Energy Efficiency, Sustainability, Saudi Vision 2030

Published online 4/25/2026, 9 pages
Copyright © 2026 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA

Citation: Ibrahim ALZUBAIDI, Faisal ALMUTAIRI, Anas ALSHAMMARI, Murtada ALZURI, Saad MAJRASHI, Samir EL-NAKLA, Ahmed ABUL HUSSAIN, IoT-Based On-demand Smart Water Heating/Cooling System, Materials Research Proceedings, Vol. 64, pp 887-895, 2026

DOI: https://doi.org/10.21741/9781644904091-110

The article was published as article 110 of the book Energy Futures

Content from this work may be used under the terms of the Creative Commons Attribution 3.0 license. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.

References
[1] M. Suhail, “Issues of Water Resources in Saudi Arabia: Past, Present and Future,” Sustainability, vol. 16, no. 3, 2024, Art. 1043. https://doi.org/10.3390/su16031043
[2] Kingdom of Saudi Arabia, “Vision 2030,” official portal, 2016. [Online]. Available: https://www.vision2030.gov.sa
[3] I. Andrić, et. al, “IoT Approach Towards Smart Water Usage,” J. Cleaner Prod., vol. 377, p. 134373, 2022.
[4] S. Jagtap, et. al, “An Internet of Things Approach for Water Efficiency: A Case Study of the Food Industry,” Sustainability, vol. 13, no. 6, 2021, Art. 3343. https://doi.org/10.3390/su13063343
[5] ArduinoExpert.io, “Smart Water Heater Using ESP32,” project tutorial, 2023. [Online]. Available: https://www.arduinoexpert.io/projects/esp32-water-heater
[6] N. J. Okoli and B. Kabaso, “Building a Smart Water City: IoT Smart Water Technologies, Applications, and Future Directions,” Water, vol. 16, no. 4, 2024, Art. 557. https://doi.org/10.3390/w16040557
[7] T. Kepplinger, et. al, “Influence of Usage and Model Inaccuracies on the Performance of Smart Hot Water Heaters: Lessons Learned From a Demand Response Field Test,” Front. Energy Res., vol. 12, 2024, Art. 1363378. https://doi.org/10.3389/fenrg.2024.1363378
[8] Leridian Dynamics, Inc., “Leridian Dynamics Announces the Smart Recirculation Control 3,” press release, Jan. 5, 2021. [Online]. Available: https://www.smartrecirculationcontrol.com
[9] Bradley Corp., “Navigator® Thermostatic Mixing Valves – Product Specifications,” Menomonee Falls, WI, USA, 2023. [Online]. Available: https://www.bradleycorp.com/navigator
[10] J. Lindmair-Snell, “Legionella: Managing the Risk in Building Water Systems,” ASHRAE Journal, vol. 63, no. 10, pp. 28–37, Oct. 2021.
[11] Centers for Disease Control and Prevention (CDC), “Developing a Water Management Program to Reduce Legionella Growth and Spread in Buildings: A Practical Guide to Implementing Industry Standards,” Atlanta, GA, USA, 2021. https://www.cdc.gov/legionella/wmp/toolkit/index.html
[12] Watts Water Technologies, “LFMMV Thermostatic Mixing Valves – Technical Data,” North Andover, MA, USA, datasheet, 2023. [Online]. Available: https://www.watts.com/dfsmedia/0533dbba17714b1ab581ab07a4cbb521/15461-source/lfmmv-td-pdf
[13] Kohler Co., “Anthem™ Digital Control and Valves – Smart Showering System,” Kohler, WI, USA, product documentation, 2023. [Online]. Available: https://www.us.kohler.com/us/anthem-digital-showering/content/CNT101300002.htm
[14] A. Robertson, “From Saving Water to Temperature Presets – Why It’s Time to Get Excited About Smart Showers,” The Guardian, Feb. 21, 2025. [Online]. Available: https://www.theguardian.com/technology/2025/feb/21/smart-showers-review
[15] L.-G. Maltais and L. Gosselin, “Energy Management of Domestic Hot-Water Systems With Model Predictive Control and Demand Forecast Based on Machine Learning,” Energy Convers. Manag. X, vol. 13, p. 100204, 2022. https://doi.org/10.1016/j.ecmx.2021.100204
[16] O. Laguili, et. al, “Model Predictive Control of Electric Water Heaters in Individual Dwellings Equipped With Grid-Connected Photovoltaic Systems,” Solar, vol. 5, no. 2, 2025, Art. 15. https://doi.org/10.3390/solar5020015
[17] C. C. Conceição, et. al, “Embedded Model Predictive Control of Tankless Gas Water Heaters to Enhance Users’ Comfort,” Machines, vol. 11, no. 10, p. 951, Oct. 2023.
[18] G. Chandrasekaran et al., “IoT Enabled Smart Solar Water Heater System Using Real Time ThingSpeak IoT Platform,” IET Renew. Power Gener., vol. 19, no. 1, e12760, 2025. https://doi.org/10.1049/rpg2.12760
[19] A. Munshi, A. Ghosh, and S. Misra, “Improved MQTT Secure Transmission Flags in Smart Homes,” Sensors, vol. 22, no. 22, 2022, Art. 8619. https://doi.org/10.3390/s22228619
[20] Decentlab AG, “Smart Water Monitoring for LoRaWAN® – DL-WS Real-Time Water Quality Station,” product brochure, 2023. [Online]. Available: https://www.decentlab.com/products/smart-water-monitoring-for-lorawan
[21] D. P. Hutabarat, Rudy Susanto, “Temperature Controller Based on IoT Application for Aquascape Environmental Treatment,” AIP Conference Proceedings, vol. 2772, 030014, Jan. 2023, doi:10.1063/5.0128826.
[22] G. Jordaan and P. Umenne, “Marine Aquarium Temperature Controller and the IoT (Internet of Things),” 2021 International Conference on Artificial Intelligence, Big Data, Computing and Data Communication Systems (icABCD), Durban, South Africa, 2021, pp. 1-7, doi: 10.1109/icABCD51485.2021.9519356.