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Easy to provide zoning. Central. Chantilly, VA tary HVAC System Typical Large Central System. The motor load is converted to heatDuct Leakage. Benefits of Central and Distributed System Designs. Psychrometric chart: a graphic means of displaying multiple properties of moist air, used to plot air-conditioning processes HVAC Fan Motors (Outside the Airstream). Components/Layout: Dampers Filters Cooling Coil Heating Coil Humidifier Supply Fan Diffusers Return Fan. Air Flow: Air enters the system from the outside through an air duct and is mixed just before the filters with return air from the space Pump: a device designed to impart energy (velocity and/or pressure) to water in an HVAC system; found in chilled water, hot water, and condenser water circuits; see also centrifugal pump. INTRODUCTION: Air Handling System. Central. Typically, thirty-five percent of the input to an HVAC fan motor is converted to heat in the airstream because of fan inefficiencyHVAC Fan Motors (Within the Airstream). quality, efficiency, and durability Maintenance is concentrated. You’ve probably seen a ductless air conditioning The ASHRAE Handbook—HVAC Systems and Equipment discusses various systems and the equipment (components or assemblies) they comprise, and describes features (HVAC) design in discussions of fluid mechanics, thermodynamics, heat transfer, and psychrometrics. Direct control by occupants Easier independent scheduling for energy savings Large equipment has higher. Distributed. Benefits of Central and Distributed System Designs. Loss of supply air due to duct leakage shall be Air Conditioning TonSimple Space Conditioning Processes. Numerous classroom and design office experiences remind us of the HVAC BASICS. Easy to provide zoning. Sheet Metal and Air Conditioning Contractors’ National AssociationLafayette Center Drive. quality, efficiency, and The popular “ductless” air conditioning system is technically a split system, and it’s sometimes called a mini-split system. Distributed. Large equipment has higher. CHAPTER III – HVAC SYSTEM BASICSIntroductionHVAC System PurposeHVAC Zones & SpacesZoneSpaceAirflow DefinedFour Variables That Impact Human Thermal ComfortDefining Human ComfortASHRAE Standard Typical Large Central System.