In these Regulations, unless the context otherwise requires—

• “cooling tower” means a device whose main purpose is to cool water by direct contact between that water and a stream of air;

• “evaporative condenser” means a device whose main purpose is to cool a fluid by passing that fluid through a heat exchanger which is itself cooled by contact with water passing through a stream of air;

• “heat exchanger” means a device for transferring heat between fluids which are not in direct contact with one another;

• “local authority” means—

  1. a

     in relation to England and Wales, a district council, a London borough council, the Common Council of the City of London, the Sub-Treasurer of the Inner Temple, or the Under-Treasurer of the Middle Temple or the Council of the Isles of Scilly;

  2. b

     in relation to Scotland, an islands or district council;

• “notifiable device” means a cooling tower or an evaporative condenser except—

  1. a

     where it contains no water that is exposed to air; and

  2. b

     where its water supply is not connected; and

  3. c

     where its electrical supply is not connected;

• “premises” means all non-domestic premises used for or in connection with the carrying on of a trade, business or other undertaking (whether for profit or not).