Combined HVAC and fire suppression system

A combined HVAC and fire suppression system, comprising:

• a HVAC apparatus including:
• a network of piping holding a heat exchange fluid and arranged for chilling the heat exchange fluid via a chiller connected to the network of piping;
• a fan coil unit connected to the network of piping, wherein the fan coil unit includes:
• a cooling coil for passage of the heat exchange fluid chilled by the chiller;
• a heating coil for heating of the air;
• a fan for movement of air over the cooling coil in order to transfer heat from the air to the heat exchange fluid in the cooling coil;
• and
• a discharge plenum for passage of air into a conditioned space after it has moved over the cooling coil;
• and
• a fluid outlet for release of the heat exchange fluid into the discharge plenum;
• wherein the heat exchange fluid in the network of piping is a clean agent, such that release of the heat exchange fluid into the discharge plenum provides a fire suppressant effect for the conditioned space, and
• wherein the discharge plenum is within a housing of the fan coil unit and wherein the discharge plenum is arranged between the fan and an outlet of the fan coil unit.