Turn Rule (HVAC)

atarget.gif (1372 bytes) This task explains the turn design rule for HVAC Design.

The turn design rule included with this application is used by the routing a run function. See Routing a Run for more information. HVAC ducts cannot be bent, therefore the HVAC turn rule does not determine a bend radius as in other applications. Instead, for HVAC, the turn rule places a part on a bend and the rules table determines what kind of part to place based on the type of run.

This is a specification-related design rule and the associated table is located in the directory ...\intel_a\Startup\EquipmentAndSystems\Hvac\Specification.

ascenari.gif (1364 bytes) 1. The image below shows the turn rule design table.

The "shape" and "size" columns in the table contain the input values. Only one nominal size value is input - the columns MinSize and MaxSize constitute a range, inclusive of the values in the two columns. Thus, an input of 1 inch is a match for this table, .5 inches is not.

The output is in the TurnPartType column, which determines the kind of part based on the run shape.

For a Round shape the diameter of the run is input; for a rectangular shape the greater of width or height is input; for a flat oval shape the greater of  width or height is input.

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