Designers often think that determining comfort conditions is as easy as using 75°F and 50% RH. However, if you are doing a LEED analysis the ASHRAE 55 Standard must be used to define comfort conditions. The standard requires looking at six primary factors and the predicted mean vote procedure that determine if comfort conditions will be achieved. In addition it evaluates these conditions at different seasons of the year. This presentation provides guideline on how to comply with the standard and the methods used in a LEED analysis.

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ANSI/ASHRAE Standard 62.1 “Ventilation for Acceptable Indoor Air Quality” endeavors to achieve the necessary balance between Indoor Air Quality, IAQ, and energy consumption by specifying minimum ventilation rates and IAQ that will be acceptable to human occupants. This seminar addresses the three components of the standard, source control, filtration and dilution. The various types of filtration and how they can help compensate for Outdoor Air, OA ,quality and how filtration can be used to improve system efficiency are also covered.

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The Montreal Protocol had a major impact on our industry and today's concerns over GWP now appear to have the potential for similar changes The US Government continues to push for regulations that will address the GWP issue and refrigerants are often considered in these regulations. Consulting engineers need to know the whole story and understand when and how it might impact their designs.  This seminar will address the choices of refrigerants and the scope of the regulations and codes that impact refrigerant choices for chillers now and in the future.

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A constant flow system is the simplest chilled water design to operate.  Constant speed pumps provide a fixed quantity of water to the system at all times, controlled by 3-way valve control at the air handler coils.  At low load building operation, the chilled water flow is by-passed around these coils. This seminar discusses the benefits and disadvantages of a constant flow design, comparing various chilled water supply temperatures and return chilled water options.  The impact of energy use of these options will be demonstrated.

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This seminar discuss the requirements of ASHRAE 90.1 2010 in the areas of building envelope, lighting, power and equipment efficiencies. In addition, topics such as economizer, reheat requirements, fan design limitation calculation and heat recovery requirements are presented.

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This seminar addresses how ASHRAE Standard 189.1 and LEED® will co-exist in the industry. Comparisons are made as to where requirements are the same and where they are different. ASHRAE 189 is anticipated to begin showing up in building codes in the near future and it is imperative that engineers and designers understand how these two important documents interact.

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The LEED® rating system has been evolving since its inception in 1998. LEED® V4 has been out for a few years but after October 31, 2016 it is required for all new projects.  This new version makes some major shifts in execution as it moves from prescriptive to performance based results. This presentation will address the key impacts of version 4.0 changes on mechanical design in commercial buildings.

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