SmartFlow installs on existing roof drainage outlets — monitoring water levels, adapting to weather forecasts, and releasing stored water in a controlled sequence to protect buildings and reduce downstream flood risk.
Solar Impulse
Efficient Solution Label
Technion
Peer-reviewed research foundation
Israel
Active field installations
Dozens
Rain events managed
Working with
How it works
Three integrated functions — running continuously and automatically.
The on-device sensor tracks water depth on the rooftop at short intervals. Sensor data streams to the cloud platform in near real-time.
The control algorithm ingests current sensor readings alongside weather forecast data to determine the optimal roof valve state for the next period.
The roof valve opens or closes based on the computed release profile. Every action is logged with timestamp, sensor state, and weather context.
System components
A compact electromechanical unit installed on the rooftop drainage outlet. It monitors water levels, actuates the drainage roof valve, and communicates with the cloud platform over a secure wireless connection.
A web-based interface for monitoring, configuration, and reporting across all managed buildings. Real-time dashboards, event logs, and alert management are accessible from any device.
The control algorithm evaluates sensor data, local weather forecasts, and configured release profiles to determine roof valve state. It operates within defined safety envelopes and supports rule-based overrides.
Performance
Every managed rooftop contributes to reduced peak discharge at the network level. The data below is drawn from active installations.
30–50%
Reduction in peak stormwater discharge
Active installations
Configurable
Discharge rate configured per site hydrology profile
Building → City
Scalable from single rooftop to city-wide network
Field evidence
SmartFlow draws on a research foundation from Israel and international research institutes and is validated through active deployments across Israel.
Control methodology informed by peer-reviewed research on rooftop retention control from Israel and international research institutes.
SmartFlow units are operating on buildings across Israel, collecting continuous performance data across rain events and seasonal cycles.
Dozens of rain events managed and logged across active sites, providing a growing dataset of real-world retention and release performance.
Awarded the Solar Impulse Efficient Solution label — recognising solutions that combine environmental protection with economic profitability.
System specifications and deployment workflows developed in consultation with hydrology consultants and building contractors.
Solutions
SmartFlow addresses the needs of building operators, developers, consultants, and municipalities — each with different priorities and measures of success.
Buildings & Property Managers
SmartFlow provides practical protection against rooftop flooding and drainage overload — with a monitoring dashboard that requires no specialist knowledge to operate.
Developers & Architects
Incorporating SmartFlow into a new development or major retrofit delivers a compliant, documented approach to stormwater management — supporting regulatory approval and green building goals.
Hydrology Consultants
SmartFlow gives hydrology consultants a deployable system that produces continuous performance data — enabling model validation, reporting, and adaptive management of individual sites.
Municipalities & Urban Stakeholders
For municipalities facing drainage capacity constraints, SmartFlow offers a distributed control approach — deploying stormwater retention at scale across the building stock.
Field data & resources
Active installations are running and collecting data. Technical resources, case studies, and hydrology guides are available in our Knowledge Center.
14 buildings · Active deployment
First coordinated multi-building deployment. SmartFlow units installed across 14 residential buildings in the Acre neighborhood, replacing the need for underground storage tanks and pump systems — with continuous performance monitoring across rain events.
Read the full case study →Stormwater management guides, blue roof technology explainers, engineering references, and a glossary of key terms — all available in our Knowledge Center.
Looking for something specific? Contact our engineering team →
Hydrological specification and field documentation available for download.
Explore the SmartFlow platform, browse solutions for different stakeholders, or learn about smart stormwater management for urban buildings.
Read our stormwater management guide, discover blue roof technology, or browse the stormwater glossary.
Talk to our engineering team about your building, site, or portfolio. We will assess fit and provide a clear picture of what deployment involves.