This is a great idea and works really well. In fact, “structure protection” in wildland fire often involves setting up sprinkler systems. These work in two ways:
1.) Turning on sprinklers for several hours before a fire arrives raises the humidity of the air around the structure, limiting a fire’s ability to burn
2.) The sprinklers get everything wet and wet stuff doesn’t burn well
The sprinklers are either fed by a pump connected to a water source like a lake or a river, a fire engine, a fire hydrant, or even the home water source. If the fire is too intense to be there when it passes, that’s ok! Sprinklers alone are often enough to protect a home without anyone even being there. We even account for the fact that the pump/hose might burn up and stop pumping. As long as the system has been running for a few hours, it’s all good.
Tldr: sprinklers work great
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