Roof Water Cooling System

These systems provide cooling by spraying water on the roof surface.

Roof water cooling system.

The built in thermostat monitors the roof temperature constantly and activates mist when needed this helps keep your roof temperature normal and saves water as well. Roof sprinklers work by spraying water at predetermined intervals on a roof s surface. While a sunlight absorbing black roof can reach up to 190 f in the summer a reflective roof s temperature can be as much as 60 f lower. John s nebraska system.

At its lowest tech a roof misting system can be little more than a garden hose set to the mist setting and aimed across the roof. The cool mist created through the system keeps your roof cool and lowers the heat absorption. This effect creates an effect equivalent of r 7 roof insulation during the day. They are simple and appear to be effective but would not be a good choice in areas where water is in short supply.

The water evaporates and cools the surface. Heat is now transferred out of the building through the roof. The principle is similar to the way the human body cools itself with perspiration. Also called an evaporative cooling system a roof misting system lowers surface temperatures by spraying an extremely small amount of water across the roof allowing the water to cool the roof as it evaporates.

John estimates that his systems saves about 5kwh per day on his cooling bill. This cooling reverses the heat flow through the roof. A cool roof reflects the sun s energy reducing rooftop temperatures. Dark surfaces also contribute to the urban heat island effect.

David s north carolina system.