An exhaust hood system can include an intake located within a building, an output, a duct positioned between the intake and the output, the duct fluidly connecting the intake and the output together, a filter positioned within the duct, the filter emitting a liquid within a portion of the duct, a drain in fluid communication with the filter, and a chamber comprising a photosynthetic agent or a fungal agent. The chamber can be in fluid communication with the drain.

A transport refrigeration unit (TRU) system is provided for use with a refrigerated cargo system. The TRU system includes a fuel cell configured to generate power for the TRU so that the TRU can refrigerate an interior compartment of the refrigerated cargo system, a cryo-compressed fuel tank to store a supply of cryo-compressed hydrogen, a heat exchanger and a conduit system configured to transport the cryo-compressed hydrogen from the cryo-compressed fuel tank, through the heat exchanger for promoting refrigeration of the interior compartment, and to the fuel cell.

An access control system receives a trigger command for controlling a ventilation system; determines that the trigger command includes a lock trigger to hold an entrance door in a closed position; and induces a locking differential air pressure between opposite sides of the entrance door in response to the lock trigger, where the locking differential air pressure is sufficient to bias the entrance door to contact or to increase contact with a door frame in the closed position. The access control system may also determine that the trigger command includes an open assist trigger to ease an opening of the entrance door; and may induce an opening differential air pressure between the opposite sides of the entrance door in response to the open assist trigger, where the opening differential air pressure is sufficient to bias the entrance door to reduce contact with the door frame in the closed position.

An access control system receives a trigger command for controlling a ventilation system; determines that the trigger command includes a lock trigger to hold an entrance door in a closed position; and induces a locking differential air pressure between opposite sides of the entrance door in response to the lock trigger, where the locking differential air pressure is sufficient to bias the entrance door to contact or to increase contact with a door frame in the closed position. The access control system may also determine that the trigger command includes an open assist trigger to ease an opening of the entrance door; and may induce an opening differential air pressure between the opposite sides of the entrance door in response to the open assist trigger, where the opening differential air pressure is sufficient to bias the entrance door to reduce contact with the door frame in the closed position.

Electronic device for regulating a thermo-fluidic system for a building, including a heating/cooling system including mixing valves adapted to control flows of hot/cold water within said heating/cooling system, the device including a control unit adapted to: receive a main signal from a building management system; receive a predefined reference signal representative of a desired parameter for the building; receive environmental signals from environmental sensors placed in the building and adapted to measure environmental parameters of said building; issue a control signal towards an actuator associated with a respective mixing valve in order to modify the opening or closing thereof.

A method for decontaminating an environment includes measuring an ozone concentration value present inside the environment and repeatedly carrying out a sequence of steps comprising: increasing the quantity of ozone present in the environment until the measured ozone concentration value reaches a first value and lowering the quantity of ozone present in the environment until the measured ozone concentration value reaches a second value lower than the first value.

An HVAC system includes a heating element, a discharge air temperature sensor, and a return air temperature sensor. A controller of the HVAC system determines that the HVAC system has been operating in the heating mode for at least a predefined amount of time. The controller receives measurements of the discharge air temperature and the return air temperature. A temperature rise value is determined using the discharge air temperature and return air temperature. If the temperature rise value is less than a predefined minimum threshold value, the controller determines that a first fault of the HVAC system is detected and provides a corresponding alert. If the temperature rise value is greater than a predefined maximum threshold value, the controller determines that a second fault of the HVAC system is detected and provides a corresponding alert.

Electronic device for regulating a thermo-fluidic system for a building, including a heating/cooling system including mixing valves adapted to control flows of hot/cold water within said heating/cooling system, the device including a control unit adapted to: receive a main signal from a building management system; receive a predefined reference signal representative of a desired parameter for the building; receive environmental signals from environmental sensors placed in the building and adapted to measure environmental parameters of said building; issue a control signal towards an actuator associated with a respective mixing valve in order to modify the opening or closing thereof.

According to various aspects, exemplary embodiments are disclosed of blow through direct fired heaters including evaporator coils and/or energy recovery ventilation.

According to various aspects, exemplary embodiments are disclosed of blow through direct fired heaters including evaporator coils and/or energy recovery ventilation.