Humidity control is like negotiating a snow drift on the road; avoid it when you can and when you can't, take it with gusto or you'll be beached waiting for the tow truck.
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To achieve HVAC efficiency that is a significant departure from LEED minimum requirements and to score substantial energy points, the system design and controls need to be the power hitters in your LEED lineup.
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If you are buying a new furnace, it will be worth your while to have a heating load calculation performed. An oversized furnace costs more to purchase, and it will cost more every day it runs.
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These data centers are power hogs. Their energy draw per square foot can stand up to all but the largest of industrial users. Putting all this power consumption in a small area means heat, and lots of it.
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Keep coils clean. Air quality, both from a pollutant standpoint, and temperature and humidity control is the primary issue. Energy savings is an added benefit.
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We need clean systems for air quality and comfort. Energy savings are a secondary issue. Clean coils may require more fan energy or less fan energy depending on the design of your system and type of fan.
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Theaters, auditoriums, and gymnasiums often provide significant savings due to high occupant density, widely fluctuating occupancy conditions, and the type of systems that typically serve these areas.
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Conventional all-air systems are designed to serve the required ventilation loads while meeting the space heating and cooling loads. A DOAS is dedicated to handle the ventilation load.
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With a conventional stack gas economizer, the exhaust temperature is maintained at 300ºF or higher to stay above the acid dew point. This limits the ability to improve the system efficiency, usually to around 85%.
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Another thing to check when evaluating your boilers is the control band. The control band is essentially the pressures (for steam) or temperatures (for hot water) at which the boiler will kick on and turn off.
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