Still containing much of its original equipment, this is surely a testament to the skill of the engineers who built and maintained the plant.

Filtering the air against radioactive particles; gas and biological warfare, the plant moves 1500 cubic meter's of air every minute. This changes the entire air contents of the bunker every 15 minutes. In the event of a fire a smoke system can remove smoke at a rate of 2200 cubic meter's a minute (52 000 cubic ft) and there is a 24 hour fire detection system in operation. Air can be refrigerated/heated, ozonated/deozonated, humidified and de-humidified.

The bunker retains a natural temperature of 18 degrees celsius with little variation. To run the heating system alone would cost over £200 per hour.

In the event of a power failure the bunker has its own emergency generator that can produce 750kva for up to three months! That is enough to supply the coastal villages in Fife.