The L Connection(r) Network fromLennox(Carrollton, TX) is a commercial building control system that is designed for easy installation and operation, according to the manufacturer. The L Connection Network consists of the network control panel system manager, integrated modular control, network thermostat control unit controllers, and unit control software. The network control panel software can interface with the LN-1 Notifact(tm) Wireless Transmitter and DataMonitor gateway protocol.