A new federal courthouse on Long Island seeks not only to illuminate visitors with the light of the law, but with plenty of natural light as well. After appropriate deliberation by the designers, the final system does justice to some creative architecture, a challenging atrium, and even preplanned expansion strategies. By John Lennon, P.E.
Mixed-flow impeller roof exhaust technology usually has been deployed for re-entrainment prevention and odor control. Now, it's providing energy savings in industrial and educational settings in a heat recovery role. By Paul A. Tetley
It's a building designed to house the backbone of the Internet, that's what. As you might imagine, its special purpose informs every building system, from mechanical to fire detection and beyond. By Victor A. Neuman, P.E.
The building envelope and mechanical system can interact to either master potential humidity problems or encourage them. However, an integrated commissioning approach can pre-empt many pitfalls before they propagate. By John F. McCarthy, Sc.D., C.I.H.
A few safety initiatives regarding other water and piping issues have left thermal expansion as a potentially disastrous problem that designers must still address. Learn about the first signs of trouble, and take a look at the potential of thermal expansion tanks. By Jim Fuller and
When an Ontario medical center shifted to a new humidification system, it helped protect the health of patients, especially those most vulnerable to complications. Subsequent reductions in energy usage and related infrastructure improvements have made the retrofit all the more welcome. By Drew Robb
They're rarely in the spotlight, but cooling towers house multiple, often overlooked chances to reduce the bottom line. From initial design to renovation options, a little forethought can lift efficiency to new heights. By Joanna R. Turpin
Following a self-balancing concept that centers around a moving neutral point, an underrated "loop" design leaves a large pharmaceutical facility's chilled water system retrofit awash in success. By John Zhang, P.E. and Ti Liu, P.E.
Leaning on experience and data from various K-12 cities and projects, the author pursues some less conventional design approaches. They may revolve around radiant heating and/or cooling, but depending on school size and other factors, the smart use of heat recovery, DOAS, and improved central plants could also put a project on the HVAC honor roll.