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Note:
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The fields will be pre-populated with default dimension. These dimension are governed by the details defined in the HVAC Catalogue. The Rectangle and Oval Extension default is auto but can be changed by you to a required dimension.
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Click Unchanged (default when Modify is selected) - positions the piece of HVAC at the co-ordinates 0.00.
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Note:
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Unchanged is usually used, when Modify is selected, it does not connect the piece of HVAC but positions it at 0.00, in effect in a floating position.
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