System for optimising an environmental parameter of an enclosed space

A system for optimising an environmental parameter of an enclosed space comprising first and second substantially enclosed regions, the system comprising:

• a ventilator configured to be externally mounted at an upper region of the enclosed space;
• a diverter valve having one or more valve members, each selectively movable in a diverter valve housing to enable the diverter valve to selectively receive therethrough a flow of air from each of the first and second enclosed regions and to direct the flow of air to the ventilator to be exhausted therefrom such that,
• when the one or more valve members are in a first position, the flow of air is received only from the first enclosed region,
• when the one or more valve members are in a second position, the flow of air is received only from the second enclosed region, and
• when the one or more valve members are in a third position between the first and second positions, the flow of air is received from both enclosed regions;
• an external sensor configured to measure an environmental parameter external to the enclosed space;
• a first internal sensor configured to measure an environmental parameter internal to the first enclosed region;
• and
• a controller, having an electronic processor and memory, configured to enable the environmental parameter of the first enclosed region to be specified,
• wherein the controller is further configured to receive the measured environmental parameters from the external sensor and from the first internal sensor, to compare the specified internal environmental parameter of the first enclosed region, the measured internal environmental parameter of the first enclosed region, and the measured external environmental parameter, and to control the one or more valve members of the diverter valve to selectively place the one or more valve members in any of the first, second and third positions and thereby determine whether the diverter valve by itself directs air from only the first enclosed region, only the second enclosed region or both of the first and second enclosed regions to the ventilator to be exhausted therefrom, such that the measured internal environmental parameters of the first enclosed region approaches the specified internal environmental parameters of the first enclosed region.