Chicago is the birthplace of the high-rise building and has been a world leader in building safety after the great Chicago fire in 1871. We applaud Mayor Daley, the City Council and the High Rise Building Safety Committee chaired by Alderman Bernard Stone for facilitating public discussion about fire and life safety in Chicago’s buildings. During recent testimony at the City Council, we were saddened to hear from senior citizens as well as building owners and managers that might have to move elsewhere or shutter buildings due to the expense of the high-rise building sprinkler mandate. We, like this committee, believe Chicagoans should be protected from fire and smoke in buildings. However, we need to keep the economics of living and employing in Chicago affordable.
HVAC experts should know something about radiation and it’s control for a variety of reasons. First, planning and designing effluent systems for laboratories and other industrial facilities requires some knowledge of this hazard and how it is used. Secondly, maintenance and repair of these systems will require some near contact with potentially contaminated components such as fume hoods, blowers, flow dampers and ductwork.
As one of the founding teams in the league that would become the NFL, the Chicago Bears are steeped in traditions that run deeper than most. The roster of retired Bears jerseys on display in the lobby of the team headquarters is awe-inspiring, the names timeless: Blanda, Butkus, Ditka, Payton, Sayers. The faithful converge on Soldier Field every home Sunday, win or lose, to shiver in the open air as the wind howls off Lake Michigan. Even the stadium itself, until recently a crumbling Greek temple with peeling plaster and questionable plumbing, has been part of the team’s mystique for more than 30 years. In such a franchise, change does not come easy.
Controlling humidity in commercial buildings used to be a difficult undertaking that was best accomplished by overcooling the supply air to increase moisture removal, then reheating the overcooled air to the desired temperature. This was a huge waste of energy. While gas desiccant systems were a viable alternative, they were relatively costly and more often used for industrial applications where very low humidity levels were required.