Designing for Comfort & IAQ: Air distribution per ASHRAE 55 and 62.1

Photo © BigStockPhoto/Pavel Losevsky

The goal of a room air distribution system is to provide thermal comfort and a healthy living environment for occupants in the space. This article looks at designing such assemblies for comfort and indoor air quality (IAQ) per ASHRAE 55 and 62.1. It examines the common method of overhead distribution, but focuses on partially mixed (i.e. most under floor air distribution [UFAD]) and fully stratified (i.e. displacement ventilation) systems.

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Defining and Refining Polished Concrete

Hiperfloor premium reflectiveHC550-0142

French-American architect Paul Philippe Cret once said, “Of the many doorways we pass in a short walk, most are fulfilling their purpose, most of them are well-enough built. [But] how many are worth a second look?” Cannot the same be said about architectural polished concrete? Are your floors meeting your design intent or did you settle? Do you know how to distinguish between the floor you asked for, and the floor being presented to you during the punch list?

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The State of HVLS Technology

Images courtesy MacroAir

Since the original high-volume, low-speed (HVLS) fan prototype came to market more than 15 years ago, there have been significant technology and design developments improving the way they function. Confidence in the product has grown with architects and engineers through the establishment of an Air Movement and Control Association (AMCA)-approved method of measuring the fan’s performance and, more recently, updated safety guidelines through the National Fire Protection Association (NFPA) 13, Standard for the Installation of Sprinkler Systems.

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