This is an explanatory, highly-illustrated encyclopaedia of terms used in the following engineering services in buildings: air conditioning; heating and ventilating; hot and cold water supply; fire-fighting and protection; drainage and sanitation; and electrical services. These services absorb an increasing share of the budgets for buildings and may account for as much as half the total cost of sophisticated high technology developments. The building services are of increasing importance to all building design and contracting teams as well as the commissioning, selling and management professionals.