Air conditioning assembly

A method of installing an air conditioning assembly in a room to form an environmental chamber, comprising the steps of:

• mounting an air handling unit outside the environmental chamber;
• installing duct work in fluid communication with the air handling unit and in fluid communication with the environmental chamber, the duct work being configured to draw air from one side of the environmental chamber through at least two outlet vents, and to blow air into an opposite side of the environmental chamber through at least two equal but opposite inlet vents, whereby the outlet vents are spaced equidistant from one another and distributed evenly along one side of the environmental chamber, and the inlet vents are spaced equidistant from one another and distributed evenly along an opposite side of the environmental chamber, such that the outlet vents mirror the inlet vents;
• and,
• installing at least one air conditioning means in fluid communication with the air handling unit, configured to condition an air flow passing through said air handling unit,
• wherein, the at least one air conditioning means comprises an altitude simulator for changing oxygen content of the air flow, and the outlet vents and inlet vents are downwardly directed such that, in use, the inlet vents are configured to drive air flow down a wall of the environmental chamber, and the outlet vents are configured to draw air up an opposing wall of the environmental chamber, creating substantially laminar air flow throughout the environmental chamber.