Provided are embodiments of a climate controlled safe system. The climate controlled safe system includes a safe body, a safe door pivotly coupled to the safe body, an insert removably coupled to the safe body, and wherein the insert further includes an insert body, an insert door pivotly coupled to the insert body, and further wherein the insert door includes a removable climate control unit and a removable hygrometer.

A method for controlling a climate test chamber for conditioning air and a test chamber includes a fuel cell assembly exposed to at least one physical test condition in a test space. The fuel cell assembly includes at least one electrochemical fuel cell having an anode compartment and a cathode compartment each having a feed opening for introducing reactants and a discharge opening for discharging waste products of the fuel cell assembly. The fuel cell assembly is operated in the test space, and a fuel gas and an oxidation gas is fed to the fuel cell assembly as reactants. The test space is supplied with conditioned supply air and exhaust air is discharged from the test space by an air conditioning and ventilation system. An oxygen concentration is determined using a sensor and a controller controls the oxygen concentration.

A system is provided that relates to fire suppression in a building. This system utilizes ductwork and the heating, ventilation, and air conditioning (HVAC) system of the building to introduce Nitrogen (N.sub.2) into the building in order to deplete the concentration of Oxygen (O.sub.2) within the building's internal atmosphere and suppress a fire. A central control unit (CCU) can monitor N.sub.2 and/or O.sub.2 levels within the building and control the supply of N.sub.2 into the building to suppress the fire while maintaining the air at an acceptable level of O.sub.2 for any building occupants to breathe.

An air conditioning assembly for an environmental chamber includes an air handling unit for supplying air to the environmental chamber. A plurality of ducts in fluid communication with the air handing unit and in fluid communication with the environmental chamber are configured to draw air from one side of the environmental chamber through at least one outlet vent, and to blow air into an opposite side of the environmental chamber through at least one equal but opposite inlet vent. At least one air conditioning means in fluid communication with the at least one air handling unit is configured to condition the air flow passing through the air handling unit. The at least one air conditioning means includes an altitude simulator for changing the oxygen content of the air flow. In use, the air conditioning assembly is configured to create substantially laminar air flow throughout the environmental chamber.

An air control system and method using air in an upper zone of the atmosphere are disclosed. An air control system using air in an upper zone of the atmosphere includes: a floating body 11 provided to stay in the upper zone of the atmosphere; air transporting pipes 15a and 15b interlocked with the floating body 11 to transport air in the upper zone of the atmosphere; blowers 22a and 22b mounted below the air transporting pipe 15a and 15b; and an air transporting controller 18 controlling an operation of the blowers 22a and 22b. According to the embodiment of the present invention, it is possible to implement functions such as cooling, drying, and purifying of the surrounding air, removing mist, or generating clouds through the transport of dry and low-temperature clean air in the upper zone of the atmosphere with a simple structure. In addition, according to the embodiment of the present invention, it is possible to freely adjust a height of air control because there is no need to install a post tower to support an elevating device because it supports the floating body 11 on the ground without the post tower.

There is disclosed a refrigerated transport container 100 comprising: a cargo space 105 for containing an interior gas; a gas transfer membrane 230 configured to transfer component gases at different rates (such as carbon dioxide and oxygen), the gas transfer membrane having an interior side to receive interior gas from the cargo space 105 and an exterior side in communication with a gas exchange portion 250 of an exterior gas pathway 240; an air mover 244 configured to drive an exterior gas flow along the exterior gas pathway 240 for gas transfer over the membrane; and a flow controller 226 configured to selectively activate the air mover to control transfer of a controlled component gas across the gas transfer membrane. There is also disclosed a refrigerated transport container in which flow of exterior gas along an exterior gas pathway is heated prior to gas transfer at a membrane, and corresponding methods of operating a refrigerated transport container.

Provided are embodiments of a climate controlled safe system. The climate controlled safe system includes a safe body, a safe door pivotly coupled to the safe body, an insert removably coupled to the safe body, and wherein the insert further includes an insert body, an insert door pivotly coupled to the insert body, and further wherein the insert door includes a removable climate control unit and a removable hygrometer.

An air conditioning assembly for an environmental chamber includes a suspended ceiling below a structural ceiling creating a plenum space. The suspended ceiling is configured to cover a substantially horizontal plane of the environmental chamber while leaving a first perimeter gap adjacent to a wall of the environmental chamber and a second perimeter gap adjacent to an opposing wall of the environmental chamber. A substantially vertical wall covers a vertical plane of the plenum space. At least one fan draws air from one from the environmental chamber into the plenum space through the first perimeter gap and blows air from the plenum space into the environmental chamber through the second perimeter gap. At least one air conditioning means in fluid communication with the at least one fan conditions the air flow passing through the at least one fan. The air conditioning assembly creates substantially laminar air flow.

An air conditioning assembly for an environmental chamber includes a suspended ceiling below a structural ceiling creating a plenum space. The suspended ceiling is configured to cover a substantially horizontal plane of the environmental chamber while leaving a first perimeter gap adjacent to a wall of the environmental chamber and a second perimeter gap adjacent to an opposing wall of the environmental chamber. A substantially vertical wall covers a vertical plane of the plenum space. At least one fan draws air from one from the environmental chamber into the plenum space through the first perimeter gap and blows air from the plenum space into the environmental chamber through the second perimeter gap. At least one air conditioning means in fluid communication with the at least one fan conditions the air flow passing through the at least one fan. The air conditioning assembly creates substantially laminar air flow.

A system and method of retrofitting a heating, ventilation, air conditioning, and refrigeration system (HVACR) including one or more brazed, soldered, or mechanical connections between refrigerant lines is disclosed. The method includes removing a refrigerant from the HVACR system. The refrigerant that is removed is a non-flammable refrigerant. An enclosure is installed over the one or more brazed, soldered, or mechanical connections between refrigerant lines. A refrigerant is added to the HVACR system. The refrigerant being added has a global warming potential (GWP) that is relatively lower than the refrigerant removed from the HVACR system. The refrigerant being added has a relatively higher flammability than the refrigerant removed from the HVACR system.