2. 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—
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;
in relation to Scotland, an islands or district council;
“notifiable device” means a cooling tower or an evaporative condenser except—
where it contains no water that is exposed to air; and
where its water supply is not connected; and
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).