This is an interesting article on the role of the Electrical Contractors Association in providing guidance for members on Smart Homes
The European Electrical Contractors' Association (AIE) and the European Telecommunication Services Association (ETSA) will shortly be announcing the launch of its 'European Smart Home Installers Scheme,' aimed at helping clients to identify companies who design, install, maintain and service smart home installations. Their system introduces the world's first system for grading smart home systems in terms of smartness and energy efficiency.
ZigBee is a low-cost, low-power, wireless standard. The technology to be widely deployed in wireless control and monitoring applications, the low power-usage allows longer life, and provides high reliability and larger range.