Factories.

Reviews methods of energy conservation in factories. States that excessive infiltration is unlikely to be the cause of high energy consumption, but that the most significant loads imposed by infiltration probably occur through open loading bays. Suggests the installment of double door lobbies to overcome this. Says the ideal factory heating system would include mechanical ventilation, with outside air mixed with warm "roof level" air. Describes potential sources of energy wastage and ways of rectifying this situation.