Product(s):	AECOsim Building Designer
	Version(s):	V8i (08.11.09.866)
	Environment:	N/A
	Area:	HVAC
	Subarea:	Design

Problem

I have a rectangular duct with 350mm high . I want to take off with round duct of 315mm.

AECOsim modelled a Ø250mm take off and create a centric reduce of  Ø250 x Ø315mm

Solution

The only way will be by placing a transition from rectangular to round, give the transition the desired dimensions and then connect round duct ( or vise versa).