Heating and ventilation system

Apparatus for controlling heating and ventilation of an enclosed area comprising a plurality of floor zones, the apparatus comprising:

• for each floor zone:
• a radiant heater spaced above each floor zone so as in use to direct heat downwards towards the floor;
• a ventilating air inlet spaced above at least part of each floor zone, the air inlet being at the same level as, or closer to, the floor than the radiant heater, the air inlet being arranged in use to draw-in a controllable quantity of air from outside of the enclosed area;
• a ventilating air outlet spaced above at least part of each floor zone, the air outlet being spaced further from the floor than the radiant heater and air inlet, the air outlet being arranged in use to extract a controllable quantity of air from inside of the enclosed area;
• a computer control system, configured in use to independently control, for each floor zone, the quantity of air being drawn in and extracted from the floor zone based on a sensed temperature inside the floor zone and a sensed temperature outside the enclosed area;
• wherein the computer control system operates automatically by sensing the difference in inside and outside temperature, and dependent on a required pressurization, increases and decreases the throughput of the inlet(s) and outlet(s) accordingly;
• and
• a pollution sensor positioned within each floor zone, wherein the computer control system is further configured in use to independently control, for each floor zone, the quantity of air being drawn in and extracted from the floor zone based on a signal from the pollution sensor within the floor zone.