Roof Sprinkler Cooling System

A rooftop sprinkler system ember s guard is adapted to protect homes from falling embers in the case of a wildfire or bushfire.

Roof sprinkler cooling system.

Heat is now transferred out of the building through the roof. This cooling reverses the heat flow through the roof. 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. The water evaporates and cools the surface.

The microclimate is the area right around where the sprinklers are located. Ember s guard roof sprinkler system is the one of the most effective efficient tool to protect property from wildfire ember attack. Ember s guard roof sprinkler systems are a temporary fire suppression system they are not designed to put out a fire but help prevent ignition. Local fire agencies agree that the only time a sprinkler system on the roof may be advisable is if you have a combustible wood roof.

When rooftop sprinklers are activated they spray water high up in the air which lands on the roof trees and other surfaces that are within range. 1 gallon of water consumes 8000 btu as it evaporates. Some of the water evaporates which increases the relative humidity while reducing temperatures in the microclimate. The principle is similar to the way the human body cools itself with perspiration.

These systems provide cooling by spraying water on the roof surface. Roof sprinklers work by spraying water at predetermined intervals on a roof s surface. An evaporative roof cooling system is designed to reduce the temperature of a roof from 165 f to about 90 f. Firesafe marin recommends that you replace any wood shake roof with a fire sesistant type a roof assembly but until that happens your house is the rare case a sprinkler might be helpful.

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. Prepare your home and property for bush fires. This effect creates an effect equivalent of r 7 roof insulation during the day. Yes water on the roof will help cool it.

As the water evaporates it cools the roof and helps to lower the temperature of the roof tiles and the ceiling cavity beneath it. Cooling with liquid water running off from a sprinkler is not efficient but evaporative cooling from a small amount of water like a periodic sprinkle is very efficient. They are simple and appear to be effective but would not be a good choice in areas where water is in short supply. One study indicates that water use is around 100 gallons per day per 1000 sqft of roof area.

Here is a some information on two roof sprinkler systems. It is also foreseeable that an owner can use the embers sprinkler system to wet the rooftop of houses on a hot day to cool down the house for general irrigation purposes or wet summer fun.