HVAC system helps provide cell phone reception
Wireless-over-HVAC technology used in the nation's largest convention center provides wireless service in a complex environment.
The nation's largest convention center, Chicago's McCormick Place , needed a wireless service boost, and the HVAC system helped provide it. ExteNet Systems installed a proprietary wireless-over-HVAC system in McCormick Place that uses HVAC metal ductwork to distribute signals and create a new indoor wireless network.
McCormick Place comprises four convention buildings with a combined total of 2.6 million sq ft of exhibit space. A wireless-over-HVAC system allowed a non-intrusive installation that provides coverage to the entire complex, including office spaces and exhibit floors, without interrupting convention or meeting schedules. ExteNet installed an indoor distributed antenna system (DAS) that can extend the reach of conventional cell sites by using discrete indoor antennas, base transceiver stations, remote radio units, and the metal ducts within the building's existing HVAC system.
Nearly 80% of mobile phone calls in the United States originate or terminate inside buildings, according to ExteNet, and wireless carriers are increasingly interested in indoor DAS. They have been installed in suburban corporate campuses, downtown high-rises, hospitals and other health facilities, and institutions of higher education.
Annual Salary Survey
After almost a decade of uncertainty, the confidence of plant floor managers is soaring. Even with a number of challenges and while implementing new technologies, there is a renewed sense of optimism among plant managers about their business and their future.
The respondents to the 2014 Plant Engineering Salary Survey come from throughout the U.S. and serve a variety of industries, but they are uniform in their optimism about manufacturing. This year’s survey found 79% consider manufacturing a secure career. That’s up from 75% in 2013 and significantly higher than the 63% figure when Plant Engineering first started asking that question a decade ago.