Due to the fact that existing services in the vicinity of the new extension were not adequate for extending, it was decided that most supplies would have to come from the main plant room or from suitable risers, etc., within the existing building. The ventilation and air conditioning, however, had to stand alone in the ceiling void of the new building as existing systems were already running at full capacity.
The extension therefore has two air handling units mounted within the ceiling void, together with a number of extract systems which discharge through external walls. One small extract system passes through the roof and can be extended upwards should a first floor ever be added. Two condensing units on the roof can also be moved up to another roof level if this become necessary.
Service distribution from the plant room, etc., caused some disruption within the existing building due to the need to take down ceilings to run the new supplies to the new extension, but these were generally kept to a minimum.
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