Roof Water Cooling System

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

Roof water cooling system.

The cool mist created through the system keeps your roof cool and lowers the heat absorption. One study indicates that water use is around 100 gallons per day per 1000 sqft of roof area. Roof sprinklers work by spraying water at predetermined intervals on a roof s surface. John estimates that his systems saves about 5kwh per day on his cooling bill.

As the water evaporates it cools the roof and helps to lower the temperature of the roof tiles and the ceiling cavity beneath it. They are simple and appear to be effective but would not be a good choice in areas where water is in short supply. 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 s nebraska system.

The principle is similar to the way the human body cools itself with perspiration. This effect creates an effect equivalent of r 7 roof insulation during the day. Heat is now transferred out of the building through the roof. 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.

David s north carolina system. An evaporative roof cooling system is designed to reduce the temperature of a roof from 165 f to about 90 f. 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. Dark surfaces also contribute to the urban heat island effect.

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.