Heating and ventilation system

1. A method of heating and ventilating an enclosed area comprising a floor arranged as a number of floor zones, the method comprising:

providing a radiant heater spaced above each floor zone so as in use to direct heat downwards towards the floor;

providing 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;

providing 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;

wherein the method further comprises, for each floor zone, independently controlling 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 method further comprises, operating 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

providing a pollution sensor within each floor zone; and for each floor zone, independently controlling 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.

2. 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.

3. Apparatus as claimed in claim 2 wherein the computer control system operates under computer control of software on non-transient computer memory.

4. Apparatus as claimed in claim 2 wherein the radiant heater is a tube radiant heater.

5. Apparatus as claimed in claim 4 wherein the tube radiant heater is a U-tube radiant heater which includes a burner and a diverting baffle located adjacent the burner and operable to divert combusting flames produced within the burner from the top to the bottom of the tube and vice versa.

6. Apparatus as claimed in claim 2 , wherein the computer system is configured to independently control the radiant heater spaced above each floor zone based on feedback received from at least one temperature sensor.

7. The method of claim 1 , further comprising independent controlling the radiant heater spaced above each floor zone based on feedback received from at least one temperature sensor.