Turn to the Experts Truly a leader in innovation, Carrier was the first company to utilize environmentally sound Puron® refrigerant in HVAC units. Without depleting the ozone layer, Puron refrigerant delivers ideal indoor air quality. Today over 2.5 million homes and businesses operate on Puron refrigerant-based HVAC systems. And as emphasis on environmental sensitivity continues to increase, Puron refrigerant will only become more relevant. Puron refrigerant is the refrigerant of the future. * Shown with optional economizer and louvered hail guards. Carrier’s RTU Open controller continuously monitors and regulates constant volume rooftop operation with reliability and precision. This advanced controller features a sophisticated, factory-engineered control algorithm that provides optimum performance and energy efficiency. The RTU Open controller also features plug-and-play connectivity to Carrier’s i-Vu® Open Control System. The i-Vu Open Control System combines state-of-the-art Carrier equipment, plug-and-play controllers, and the powerful, web-based i-Vu user interface to form a cohesive, intuitive, and fully integrated building automation system (BAS). For added flexibility, Carrier’s RTU Open controller is capable of standalone operation. Or, it can be integrated with any BAS utilizing the BACnet®, Modbus®, Johnson Controls® N2 or LonWorks® protocols. The Future of the World Depends on Our Ability… to Sustain it. As the world’s leader in high technology heating, air-conditioning and refrigeration solutions, we believe that market leadership requires environmental leadership. Carrier sets industry standards for environmentally sound business practices and a commitment to sustainability across its products, services and operations. We demonstrate this commitment by creating environmentally responsible solutions that consume less energy and incorporate innovations that improve the world – indoors and out. BACnet® is a registered trademark of American Society of Heating, Refrigerating and AirConditioning Engineers (ASHRAE). MODBUS is a registered trademark of Gould Inc. LONWORKS is a registered trademark of Echelon Corp. 1-800-CARRIER www.carrier.com Carrier Corporation ©2011 A member of the United Technologies Corporation family. Stock symbol UTX. Cat. no. 18-848-171-25 Manufacturer reserves the right to discontinue, or change at any time, specifications or designs, without notice and without incurring obligations. WeatherMaster® High Efficiency Commercial Packaged Rooftop 3 to 25 Ton

WeatherMaster High Efficiency and Easy Replacement ® Gas Heating / Electric Cooling Models – 48HC Nominal Cooling Ton Size … and Maintain Designed with streamlined installation, maintenance and low operating cost in mind, Carrier® WeatherMaster® rooftops from 3 to 25 tons have everything you need. Available in • Gas heating/electric cooling • Electric heating/electric cooling • Packaged heat pumps The control board allows for easy troubleshooting and servicing of the system network controller. Conveniently located access panels provide quick, safe access for easy maintenance and service. Attention...