The LN-1 Notifact™ transmitter is a wireless device designed specifically for L Series® rooftop packaged units to operate virtually anywhere a cell phone operates in North America, the company says. The rooftop series offers 14 different cooling capacities ranging from 3 to 30 tons. The transmitter provides direct plug-and-play communi-cations capabilities with the rooftop’s Integrated Modular Control (IMC) board. The IMC has more than 80 diagnostic codes that diagnose and identify problems for service contractors, says the manufacturer.