Q&A from the company.
https://www.frontlinewildfire.com/protect-home-with-roof-wildfire-sprinkler-system/#fire-back
The system can connect to municipal, well, and/or pool water sources. Unlike interior fire sprinklers, the system is dry until activated, meaning the pipes do not hold water when the system is off.
The Frontline controller needs electricity to receive the remote activation signal from the Frontline app. The controller has a built-in battery backup that will be used if the power is out. If power is present the controller will use electricity from your home. If pool or well water is being used, a dedicated pool pump with backup power source (such as a generator or home battery) is required.
The Class A firefighting foam is formulated to make water more effective for preventing fire. Surfactants significantly reduce water’s surface tension and, when mixed with air it surrounds fuel with a thick layer of water. This creates a barrier between the fuel and the fire making the water more effective reducing the amount of water needed to protect your home.
The system will run for 5 to 7 minutes per zone (if multiple zones have been installed on your home). It will then turn off for 30 minutes. After 30 minutes it will cycle through all zones again. As long as the system has access to a water source, it will run like this until it is deactivated.
Designed to run and remain effective with low water pressure, Defense System 2 is constantly measuring and optimizing available water. Our system runs in a series of zones, much like landscaping irrigation systems, so that we can limit the water required at any given time. The use of Class-A foam further reduces the amount of water used. Typically our system will use your home’s primary water source first. If the system senses a drop in pressure it automatically switches to an available secondary water source such as a pool, tank, or well.