When building a new house, choosing a wired security alarm system is definitely recommended, as the wiring can be easily completed while the house is being built. When retrofitting an alarm system into a house, a wired system is still recommended, due to the reliability and performance it offers. However in practice, sometimes it is not practical to retrofit a wired sensor to a particular point in the house. In this situation a wireless component can be best.
That's why at Chubb our systems include hybrid security systems which features both hardwired and wireless components. This gives greater flexibility when installing a security system, while still enabling us to hardwire as many components as practicable.