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Data Center (DC) - A facility where the computing and telecommunication infrastructure (CTI) is housed. Computer Rooms are typically specially conditioned room for heating/cooling and power. Computer Room is often an alternate name for a data center.
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Data center infrastructure efficiency (DCiE) - An efficiency measure that is calculated by dividing the IT equipment power consumption by the power consumption of the entire Data center. This measure is the inverse of PUE.
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Dead Band - An HVAC energy saving technique whereby sensitivity set points of equipment are set more broadly to improve coordination of the equipment and avoid offsetting behaviors, also dead band control strategy.
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Delta T - Delta temperature, the spread between the inlet and outlet air temperatures of air conditioning equipment, measured as the maximum achievable difference between inlet (return) and outlet (supply) temperatures.
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Dewpoint - The temperature at which air reaches water vapor saturation.
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D/H - Dehumidifying/Humidifying
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Dry-Bulb Temperature - The temperature of the air measured using a dry-bulb thermometer, typically taken in conjunction with a wet-bulb reading in order to determine relative humidity.
