A set of domestic products and services have been developed involving intelligent appliances which use gas. Once the dwelling has been equipped with a Gas Enabler (a sort of domestic infrastructure) which is specially designed for existing dwellings, new appliances related to comfort and security can be added. Furthermore, the Gas Enabler enables tele-access from the outside of the dwelling or control of equipment by the user, etc. Administrating emergency and technical intrusion alarms from the inside and outside is also possible. The products that have been developed are integrated into a complete system of electrical and gas domestics, systems for electrical energy and gas management, technical security, urgency alarms, anti intrusion devices. The system is a complete and modular power line media which is oriented to the existing residential market in Europe.