A Psychrometric Approach to Air-Side-Economizer Limits By FRED W. DOUGHERTY, PE, BAE, MME, Panacea, Fla.
Constant-volume air-conditioning systems control space air temperature directly and humidity indirectly by modulating or cycling the cooling apparatus. This article examines the effect of economizer operation on the comfort of spaces served by constant-volume air-conditioning systems. [MORE]
Court Dismisses Lawsuit Against U.S. Green Building Council
A lawsuit alleging the U.S. Green Building Council (USGBC) is misleading consumers and misrepresenting the energy performance of buildings certified under its Leadership in Energy and Environmental Design (LEED) rating systems was dismissed last week by a New York District Court judge. [MORE]
Standard 90.1-2007 Established as National Reference Standard for Federal, Commercial Buildings
Commercial and high-rise residential buildings, including federal buildings, must now meet requirements in the 2007 version of ANSI/ASHRAE/IESNA Standard 90.1, Energy Standard for Buildings Except Low-Rise Residential Buildings, according to rulings recently issued by the U.S. Department of Energy (DOE). [MORE]
USGBC Report Highlights Green-Policy Advancements in the United States
A free report highlighting actions states are taking to transform the green-building market is available from the U.S. Green Building Council (USGBC). [MORE]
Tour of Free Fire-Alarm-Technology and Code Seminars Continues
Silent Knight by Honeywell has expanded its U.S. tour of free seminars on fire-alarm technology and code requirements. [MORE]
NEW! Cost-efficient HVAC Transmitters from Vaisala Vaisala introduces 2 new transmitters for HVAC applications. The Vaisala HUMICAP® Humidity and Temperature Transmitter HMW80 is stable and dependable for use in heating and ventilation systems. The Vaisala HUMICAP® Humidity and Temperature Transmitters HMT120 and HMT130 are ideal for more demanding HVAC or cleanroom applications with interchangeable probe for easy field calibration. Click here for more info. --Vaisala
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