A dispensing unit that consists of two or more dispensing solutions, at least one being a fluorine-free foam solution, and at least one hydrogel-based solution, and which involves the dispensing of each solution through one or more compressed air foam system (CAFS), where the CAFS may use compressed air, nitrogen, or other inert gas. The individual solutions may be mixed prior to the CAFS, or one or more solutions mixed after the CAFS, or they may be mixed in separate CAFS chambers. The resulting foam may be dispensed through a single line or through multiple lines, applied simultaneously and/or at different times, and may be controlled manually and/or through automatic controls, or through a combination of the above.

Antifreezes are provided for deployment in wet sprinkler systems located in cold environments. The antifreezes allow for the wet sprinkler system to be actuated under temperatures below 32° F. Wet sprinklers, sprinkler systems, methods of providing for the control, suppression and/or extinguishment of a fire that occur in a cold environment, and methods of preventing wet sprinklers from freezing also are provided. The sprinklers, sprinkler systems and methods can be used in residential, commercial and storage settings.

A wide-area wildfire suppression system uses a network of geographically distributed water sprayers, and includes at least one wind sensor and a fire-suppression controller communicatively coupled to the water sprayers and the at least one wind sensor. The at least one wind sensor detects wind direction and communicates wind-direction information to the fire-suppression controller, which uses the wind-direction information to activate at least one of the water sprayers upwind of an asset or area to be protected. Parameters of the water spray, such as flow rate, droplet size, spray pattern, spray direction, spray elevation, or aeration, can be adapted based on wind direction or wind speed.

A wide-area wildfire suppression system uses a network of geographically distributed water sprayers, and includes at least one wind sensor and a fire-suppression controller communicatively coupled to the water sprayers and the at least one wind sensor. The at least one wind sensor detects wind direction and communicates wind-direction information to the fire-suppression controller, which uses the wind-direction information to activate at least one of the water sprayers upwind of an asset or area to be protected. Parameters of the water spray, such as flow rate, droplet size, spray pattern, spray direction, spray elevation, or aeration, can be adapted based on wind direction or wind speed.

A fire suppression system includes at least one high pressure gas source containing an inert gas, at least one low pressure gas source containing an organic halide gas, a distribution network connected with the high pressure gas source and the low pressure gas source to distribute the inert gas and the organic halide gas, and a controller in communication with the distribution network. The distribution network includes flow control devices configured to control flow of the inert gas and the organic halide gas. The controller is configured to initially release the inert gas in response to a fire threat to reduce an oxygen concentration at the fire threat below a preset oxygen concentration threshold, and release the organic halide gas to increase an organic halide gas concentration at the fire threat above a preset organic halide gas concentration threshold while the oxygen concentration is below the preset oxygen concentration threshold.

A fire suppression system includes at least one first gas source containing an inert gas, at least one second gas source containing an organic halide gas, a distribution network connected with the first gas source and the second gas source to distribute the inert gas and the organic halide gas, and a controller. The distribution network includes a common manifold, input lines connecting the first gas source and the second gas source with the common manifold, output lines leading from the common manifold, and flow control devices. The controller is in communication with the distribution network and configured to distribute the inert gas responsive to a fire threat signal and determine whether to distribute the organic halide gas based upon a location of a fire threat.

A residential or commercial sprinkler system is provided wherein the sprinkler heads and piping distribution network are provided with a relatively low pressure fire suppressant liquid in place of pneumatic pressure, which is typical, and control valve keeps fire suppressant supply pressure from entering the discharge sprinkler system at design discharge pressure until a fire detection system detects a fire condition. Upon the detection of a fire condition, a control valve is opened to provide the sprinkler heads and piping distribution network with a fully pressurized supply of fire suppressant. Also in the case of electric control power loss the system will operate from loss of outlet supervised pressure releasing sprinkler liquid suppressant to the discharge system of closed fused sprinklers.

A modular data machine room includes a data cabinet subsystem, a cooling subsystem and a power distribution subsystem. The data cabinet subsystem includes two columns of data cabinet groups, and each column of data cabinet group includes at least one data cabinet. The cooling subsystem includes at least one cooling unit, and the cooling unit is arranged in the two columns of data cabinet groups. Each data cabinet and cooling unit is connected with the power distribution subsystem through an interface. The machine room further includes a sealing subsystem, which seals a cold/hot channel between the two columns of data cabinet groups. The machine room has a short construction period and a high cooling efficiency.

A wet pipe fire protection sprinkler system and method of operating a wet pipe fire sprinkler system includes providing a sprinkler system having a pipe network, a source of water for the pipe network, at least one sprinkler head connected with the pipe network and a drain valve for draining the pipe network. An inert gas source, such as a nitrogen gas source, is connected with the pipe network. Inert gas is supplied from the inert gas source to the pipe network. Water is supplied to the pipe network thereby substantially filling the pipe network with water and compressing the inert gas in the pipe network.

A method of suppressing a fire includes the steps of dispensing a first inert gas in a suppression area at an initial rate, detecting an undesired temperature in the suppression area, dispensing a second inert gas at a subsequent rate in the suppression area in response to the undesired temperature and displacing a volume from the suppression area with the inert gas to achieve a temperature below the undesired temperature.