Best of 2011!
Here are HPAC Engineering's most read articles of 2011
Preventing loss of life, property damage, and business interruptions...
While there has been some criticism of the LEED Accredited Professional (LEED AP) credentialing process, it remains a valuable professional designation and one that is likely to grow more valuable in the future. That's because the LEED governing body, the U.S. Green Building Council (USGBC), has done a good job marketing itself and the LEED process. Interest in green design continues to grow, as does the demand for LEED AP participation in sustainable projects....
Most humidifier manufacturers have software to help size and select humidification equipment. Still, it is important to understand the theory behind calculating...
A cooling tower is only as good as the details of its design and the specification of its supporting components. Details such as pump net positive suction...
In many large commercial buildings, central-station air handlers are used to maintain occupant comfort. Often, these units include return fans, which...
The No. 1 question about fire and smoke dampers that mechanical engineers and contractors ask is, How do the controls work with the actuators? This article...
Design criteria for smoke-control systems have changed over the years. Instead of ventilating an affected area, smoke-control systems now must prevent the spread of smoke to non-affected areas and/or provide a tenable environment in the area of incident. How effective are current smoke-control systems? Can building-code requirements for smoke-control systems be met reasonably? How can applications not described in building codes be addressed?...
The development and application of steam- and hot-water-boiler technology forever is evolving—and has been for decades. Not only is this technology responsive to the market's expectations, it looks ahead and offers innovative solutions to emerging challenges....
Demand-controlled ventilation (DCV) can reduce the cost of operating an HVAC system. But implementing DCV based on indoor levels of carbon dioxide (CO2) is not as straightforward under the 2007 version of ANSI (American National Standards Institute)/ASHRAE (American Society of Heating, Refrigerating and Air-Conditioning Engineers) Standard 62.1, Ventilation for Acceptable Indoor Air Quality, as it was under previous versions....
Direct gas-fired air-handling units (AHUs) have provided efficient, reliable makeup air for many high-exhaust/infiltration industrial applications and...
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