Exchange HVAC Model (Equipment)

Exchange of information about shape, size and location of HVAC components.

HVAC systems information can then be brought together with equivalent information from other roles to ensure that items of equipment are in proper spatial and functional relationship to each other taking into account their size and location in terms of space allocation and structural provision.

Please ensure that you have read the process mapping document HVAC Engineering (PM) before proceeding with this exchange requirement.

This exchange requirement allows for the provision of information at various stages during the design process including outline conceptual or sketch design, full conceptual design and coordinated design. The information provided at each stage is essentially the same. However, the level of certainty regarding equipment and components used will increase at each stage allowing greater certainty in space provision.

It is assumed that the information provisions outlined in the exchange requirement er_exchange_HVAC_model (space) have been satisfied. This provides an initial assessment of spaces from the perspective of building design and HVAC design as well as project details.
Information provided through this exchange requirement includes:

• HVAC component type and size
• Required electrical connection load and control/starting method
• Required piping connection loads for each service type
• Required control system interfaces and system logic
• Shape representation of component (using an appropriate representation form that may be symbolic, 2D, 3D boundary representation etc.); the form of representation to be used and the extent of detail that is provided for the component may differ at different stages of the project.
• Weight (and optionally center of gravity) of component type
• Location and orientation of occurrences of component type

The requirement to specify duct networks would not normally be required, but may be necessary where the imposed load of the ductwork exceeds normal structural design criteria, for example fire rated ductwork constructed of heavy guage materials.

Information Requirements

Context	Description	Man	Rec	Opt	Actor Supplying	Functional Part
Precursor	The provisions of the exchange requirement er_exchange_HVAC_model(space) must be satisfied. This includes: all context information provided through project details spatial structure elements (site, buildings, storeys, spaces) including suggested and accepted modifications to technical spaces				HVAC Design	er_exchange_HVAC_model(space)
Precursor	The provisions of the exchange requirement er_exchange_structural_model must be satisfied so that the shape, size and location of structural members are available for reference and coordination.				Structural Design	er_exchange_structural_model
Owner History	The owner history of the equipment must be asserted.				HVAC Design	fp_model_HVAC_equipment (type, predefined_type)
General Attributes	For each item of HVAC equipment to be considered, general attributes of the equipment types and occurrences may be specified including: name to extend identification of the type or occurrence description that can be used for any further qualifying information				HVAC Design	fp_model_HVAC_equipment (type, predefined_type)
Placement and Shape	The shape representation and placement for the HVAC equipment should be asserted. The shape representation of an item of HVAC equipment is typically a representation map which is defined for the equipment type and then referenced for each occurrence. Each occurrence specifies its own placement. Within the representation map, the particular form of the shape representation may differ according to the life cycle stage as with flow segments. Generally, the representations selected for the flow fitting representation map will follow the representations selected for flow segments. Note that since IFC generally allows for elements to have multiple shape representations, provision of shape representations of HVAC systems at different lifecycle stages should be considered as cumulative and not as alternative. Representations may be either: Axis Representation Body Representation Swept solid CSG Bounding box Boundary representation (Brep)				HVAC Design	fp_model_HVAC_equipment (type, predefined_type)
Equipment Weight	As well as the placement and shape of components, the weight of major items needs to be captured and communicated to ensure structural coordination				HVAC Design	fp_define_quantity

Results

Type	Information Requirements	Actor Receiving
Model	Building model updated for component information providing information to the Building Designer. Shape and location of components may have been provided previously or may be specified through this exchange requirement.	Building Design (RS)
Model	Building model updated for component information providing information to the Electrical Designer. Electrical requirements of components may have been provided previously or may be specified through this exchange requirement.	Electrical Design (RS)
Model	Building model updated for component information providing information to the Piping Designer. Piped Services requirements of components may have been provided previously or may be specified through this exchange requirement.	Piping Design (RS)
Model	Building model updated for component information providing information to the Controls Designer. Control requirements of components may have been provided previously or may be specified through this exchange requirement.	Controls Design (RS)
Model	Building model updated for component information providing information to the Structural Designer. Shape and location of components may have been provided previously or may be specified through this exchange requirement.	Structural Design (RS)

Referenced by

This list shows all process maps which reference this specific ER.

Controls Engineering (PM) (Information Delivery Manual (IDM)) — Controls engineering deals with the overall process of planning, designing, installing, commissioning, operating and maintaining HVAC controls and automation systems for building projects. Labels: pm, er-exchange-hvac-model-equipment, er-exchange-hvac-model-systems

Cost Modelling (PM) (Information Delivery Manual (IDM)) — Cost modelling is a process that attempts to bring design and price together. It has the objective of controlling costs, not just to measure them. Cost modelling therefore is defined to be the assessment and control of cost prior to the availability of knowledge of the element content of a project. Labels: pm, er-exchange-hvac-model-equipment

Electrical Engineering (PM) (Information Delivery Manual (IDM)) — Electrical engineering deals with the overall process of planning, designing, installing, commissioning, operating and maintaining electrical power systems for building projects. It deals with low voltage electrical installations from 12V (AC/DC) to 1000V (AC) or 1500 volts (DC) in accordance with IEC definitions. Electrical installations within scope of this process are considered to commence at a meter where the public utility supply terminates or at a transformer where voltage is stepped down to the low voltage range in scope. Incoming electrical supplies and distribution of electrical energy at higher voltages are considered to be out of scope of this process. Labels: pm, er-exchange-hvac-model-equipment

HVAC Engineering (PM) (Information Delivery Manual (IDM)) — HVAC engineering deals with the overall process of planning, designing, installing, commissioning, operating and maintaining heating, ventilating and air conditioning (HVAC) systems for building projects. Labels: pm, er-exchange-hvac-model-equipment

Piping Engineering (PM) (Information Delivery Manual (IDM)) — HVAC engineering deals with the overall process of planning, designing, installing, commissioning, operating and maintaining heating, ventilating and air conditioning (HVAC) systems for building projects. Labels: pm, er-exchange-hvac-model-equipment