Circ Diffuser - Circ Inlet (CEIE)
- Last UpdatedMay 22, 2026
- 2 minute read
The task of creating an HVAC Component is initiated from the HVAC Window.
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Select Extra Inline Equipment in the Categories drop-down list and then Circ Diffuser - Circ Inlet in the Available Type drop-down list to display the Circ Diffuser - Circ Inlet window:

The Circ Diffuser - Circ Inlet window default is a standard stock size, but can be changed by you using one of the following methods:
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Standard Stock Sizes
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In the Name(Ref) field, input the name of the HVAC component.
Note: The fields will be pre-populated with default dimensions. These dimensions are governed by the details defined in the HVAC Catalogue.
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To choose from the standard stock sizes available from the HVAC Catalogue, in the Stock Size drop-down list, click the required size for the HVAC component.
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The Clash Vol OUT field will be pre-populated with the obstruction volume associated with the Circ Diffuser - Circ Inlet and the ducting, but can be changed by you to the required joint.
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Non Standard Stock Sizes (Special)
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If you chose not to use a standard stock piece of HVAC, from the Stock Size drop-down list, click Special.
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You are required to input the following dimensions:
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Name(Ref)
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Duct Diameter
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Outlet Diameter
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Body Length
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Arrive Extension
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To visualize how the dimensions equate to the actual piece of HVAC, click Picture to display a detailed drawing for Circular Diffuser with Circular Inlet (CAEPE).
Note: The fields will be pre-populated with default dimensions. These dimensions are governed by the details defined in the HVAC Catalogue.
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Specify a type of joint to use for the Arrive Joint. Refer to Create/Modify HVAC Component for a detailed description.
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The Clash Vol OUT field will be pre-populated with the obstruction volume associated with the Circ Diffuser - Circ Inlet and the ducting, but can be changed by you to the required joint.
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In the Position list, select Connect or Unchanged:
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Click Connect (default when Create is selected) - connects the piece of HVAC to the previous one.
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Click Unchanged (default when Modify is selected) - positions the component at the co-ordinates 0.00.
Note: Unchanged is usually used, when Modify is selected, it does not connect the component but positions it at 0.00, in effect in a floating position.
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Click Defaults to reset all the fields back to when the Circ Diffuser - Circ Inlet window was opened.
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Click Fit to orientate the Circ Diffuser - Circ Inlet to automatically match the outlet (p-leave) of the previous piece of HVAC to the inlet (p-arrive) of the next piece.
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Click OK to create the Circ Diffuser - Circ Inlet component and close the Circ Diffuser - Circ Inlet Window. You will be returned to the HVAC Window.
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Click Cancel to discard all the field changes and close the Circ Diffuser - Circ Inlet window.