AECOsim Building Designer Help

Duct Accessory types

The Duct Accessory group comprises various fittings used in connecting HVAC segments of a route.

Key In Syntax

Follows the Placement Key In syntax.
BMECH PLACE COMPONENTBYNAME <schema name> <item name> dsc=HVAC

Types of Fittings

The below list of fittings illustrates the tool icon along with the <schema name> <item name> used in above key in syntax, and the description of the fitting.

Access Doors
BMV_RectangularFlatAccessDoor "Flat Panel" Default Access Door - Flat Panel — The moderate sheet thickness panel fits on a surface of rectangular duct. The door can be set hinged or with cam.
BMV_RectangularStdAccessDoor "Standard Rectangular" Default Access Door - Standard Rectangular — The thickness adds strength to the panel, give way to a standard rectangular access door suitable to fit on rectangular ducts. The door can be set hinged or with cam.
BMV_RectOvalAccessDoor "Flat Oval" Default AccessDoor - Rectangular Flat Oval — The oval shape flat panel gives smooth edge advantage over cornered door. Flat oval design optimizes access area and simplifies installation. Attachment available as hinged or with cam.
Flat Panel" Default Access Door - Radius Flat Panel — The moderate sheet thickness roll-formed door pane fits on a surface of round duct. The door can be set hinged or with cam.
"Radius Flat Oval" Default Access Door - Radius Flat Oval — Flat oval access panel provide easy access into air ducts and units. The thickness adds strength to the panel, give way to a oval access door suitable to fit on round ducts. The door can be set hinged or with cam.
"Radius Pressure Relief" Default Access Door - Radius Pressure Relief — Pressure relief access doors are designed for use in low to medium pressure duct systems. They provide a means of gaining access to damper components inside the ductwork. Assures a tight seal without obstruction in the air system.

Attachment available as hinged or with cam.

BMV_OvalAccessDoor "Flat Panel" Default Access Door - Oval Flat Panel — The moderate sheet thickness rectangular door pane fits on a surface of oval duct. The door can be set hinged or with cam.
BMV_OvalAccessDoor "Standard Rectangular" Default Access Door - Oval Standard Rectangular — Flat rectangular access panel provide easy access into air ducts and units. The thickness adds strength to the panel, give way to an access door suitable to fit on oval ducts. The door can be set hinged or with cam.
BMV_OvalAccessDoor "Flat Oval" Default Access Door - Oval Flat Oval — Oval access doors are designed for use in low to medium pressure duct systems. They provide a means of gaining access to damper components inside the ductwork. Assures a tight seal without obstruction in the air system.

Attachment available as hinged or with cam.

Adaptors
RectAdapter Default Rectangular Adapter — Used to line up with the duct extension.
RectangularCap Default Rectangular Cap — Cap can have a handle when the Cap Type property is set to 1.
RectCoupling Default Rectangular Coupling — Couples up two straight ducts. Economical over elbow
RectFlexConnection Default Rectangular Flex Connection — This component acts as a vibration isolation fitting.
RoundAdapter Default Round Adapter — Used to extend ductwork by connecting round ducts in a line.
RoundCap Default Round Cap — Cap fitting used to cover up the duct terminal. It can have a handle when the Cap Type property is set to 1.
RoundCoupling Default Round Coupling — Coupling connects two round ducts laid in a straight line. Advantageous over elbows.
RoundFlexConnection Default Round Flex Connection — This component acts as a vibration isolation fitting.
OvalAdapter Default Oval Adapter Default — Used to extend ductwork by connecting oval ducts in a line.
OvalCap Default Oval Cap — Cap fitting used to cover up and close the duct terminal. It can have a handle when the Cap Type property is set to 1.
OvalCoupling Default Oval Coupling — Coupling connects two oval ducts laid in a straight line. Advantageous over elbows.
OvalFlexConnection Default Oval Flex Connection — This component acts as a vibration isolation fitting.
Elbows
RectangularElbow DefaultRect Rectangular Elbow — Rectangular Elbow Radius elbow that connects two rectangular ducts in a given angle. The auto-fitting option connects the ducts when the run is deviated in an angle. The custom defined vanes inside the elbow controls the air flow.
RectangularElbow Mitered Rectangular Elbow Mitered — Joining of two equal duct segments in an angle forms a mitered elbow. A true miter bend is a 90 degree bend made by cutting two pieces at 45° and joining together.
RectangularElbow RadiusThroatSquareHeel Radius Throat Square Heel Elbow — Square heel elbows with radius throat fittings are best suited in rectangle turns.
RectangularElbow SquareThroatRadiusHeel Square Throat Radius Heel Elbow — Radius heel elbows with square throat.

Use of square throat elbows and tees in ductwork promote a more uniform airflow and reduced turbulence, when associated with turning vanes . The square throat tee eases branching out flow in a desired angle in rectangular duct routing.

RectangularTee Default Rectangular Tee — Rectangular duct splitter tee to connect a main duct with two branches of duct in angle.
SquareThroatTee "Default" Square Throat Tee — A square throat tee advantages branching out flow in a desired angle in rectangular ductwork.
SideBranch "Rectangular Side Branch" Rectangular Side Branch — Rectangular duct side branch fitting provided with an end connection to connect duct segment branched out in an angle.
RoundElbow DefaultRound Round Elbow — A radius elbow for connecting round ducts in an angle. Suitable in installation of duct-out hoods.
RoundElbowMitre "Mitre Elbow" Round Elbow Mitre — Curved elbow formed by connecting separate sections called gores formed by defining the Number of Mitres property that in turn controls angle of each segment.
SegmentedBend2 "Segmented Bend End Segment" Segmented Bend End Segment — Placing Segmented Bend End Segment elbows with an offset between its outlets eliminates the need to use a combination of fittings when routing through tight spaces. Segmented Bend End Segment elbow connects two offset ducts. For example, set the value of "Offset" property to alter elbow's second outlet is offset accordingly.
SegmentedBend "Segmented Bend" Segmented Bend — Segmented elbows provide more flexibility when routing round duct systems.
OvalElbow DefaultOval Oval Elbow — The angular elbow fitting formed with number of segments connecting in a defined angle.
Transitions
RectangularTransition "Centric Reducer" Rectangular Transition — Allows for a change in duct size to meet air flow requirements of the system, or to adapt to existing duct of a different size.
RectRndTransition RectToRnd Transition Rectangular To Round — Allows connecting a rectangular duct to a round duct in the straight path of duct flow.
RectOvalTransition RectToOval Transition Rectangular To Oval — Allows connecting a rectangular duct to an oval ductwork or stack .
RectOgee Ogee Rectangular Ogee — Ogee provides a way to connect offset duct routes. This fitting is not catalog driven as these types of offsets usually require a fabricated piece.
RoundTransition "Centric Reducer" Round Transition — Round transition allows connecting a round duct run to another duct of different diameter.
RectRndTransition RectToRnd Transition Rectangular To Round — This transition allows connecting a round duct run to rectangular duct of different duct size, as required
RoundOffset Default Round Offset — The round offset allows connecting two parallel ducts or duct and duct fittings in a large ductwork and routes. The round offset adds duct transition and aids in connecting two parallel ducts or duct and duct fittings with a desired rise value set.
OvalTransition "Centric Reducer" Oval Transition — Oval transition allows connecting an oval duct run to another duct of different duct size.
OvlRndTransition "Oval Round" Transition Oval To Round — Oval to round transition allows connecting an oval duct run to a round duct of different duct size.
RectOvalTransition RectToOval Transition Rectangular Duct To Oval — This transition allows connecting an oval duct run to rectangular duct of different duct size, as required.
OvalOffset Default Oval Offset — The oval offset allows connecting two parallel ducts or duct and duct fittings in a large ductwork and routes. The oval offset adds transition and aids in connecting two parallel ducts or duct and duct fittings with a desired rise value set.
connectors - wyes
RectangularWye Default Rectangular Wye — A rectangular fitting that connects the main segment duct with two branches of rectangular ducts. Either or both the branch angles can be set to 90° or less. The radius of branches manage the curved segments.
Trouser Trouser Rectangular Trouser — The trouser fitting branches out two end segments spaced apart with an offset value. Each straight branch used to connects to a rectangular duct.
RectBreech Breech Rectangular Breech — A 3 way rectangular fitting that connects the main segment duct with two branches of rectangular ducts. Either or both the branch angles can be set to 90 degrees or less.
SquareThroatCross "Square Throat Cross" Square Throat Cross — A square throat cross fitting facilitates connecting two straight ducts at their intersection keeping the duct segments in same plane. In place of ducts, the ends may have one or more terminal equipments connected in the route.
RadiusThroatCross "Radius Throat Cross" Radius Throat Cross — A radius throat cross fitting facilitates connecting two straight ducts at their intersection keeping the dusts in same plane. The radius at each branch controls the angular displacement of the cross ends.
ThreeWayTee "Three Way Tee" Rectangular Cross — A three way tee fitting that incorporates a straight reducer and two side angular branches to connect rectangular duct segments.
RectNestedTee "Rectangular Nested Tee" Nested Fitting — A nested tee fitting provides connecting capability of connecting a duct to multiple rectangular branches and terminal equipments.
RoundTee RoundTee Round Tee — Tee branches out an end connection to connect to a round duct.
ConicalTee "Conical Tee" Conical Tee — Reducing airflow tee fitting in round ductwork .
SaddleTee "Saddle Tee" Saddle Tee — A snap tee, used to quickly add on existing duct to connect a branched outlet.
RoundWye "Round Wye" Round Wye — These "Y" shaped ducting components transition from one round duct into two round ducts.
RoundTrouser "Round Trouser" Round Trouser — Round trouser fitting branch out two end segments spaced apart with an offset value. Each end is used to connect to round duct .
RoundBreech "Round Breech" Round Breech — A 3 way round breech connects the main segment duct with two branches of round ducts in the angle 90 ° or less.
RoundThreeWay "Three Way" Round Three Way Wye — A round fitting with one inlet and two branch outlets of uniform size placed at default 45° to inlet. Though, the angles can be manipulated per requirement of flow.
OvalTee OvalTee Oval Tee — Flat oval trouser fitting branch out two end segments spaced apart with values defined for top and right offsets.
OvalTrouser "Oval Trouser" Oval Trouser — Flat oval trouser fitting with lateral branch.
OvalWye "Oval Wye" Oval Wye — Flat Oval Wye fitting with lateral cross, branched in a given angle.
OvalCross "Oval Cross" Oval Cross — A three way oval cross fitting that incorporates a straight reducer and two side angular branches to connect oval duct segments.
OvalReducerCross ReducerCross Oval Reducer Cross — Flat Oval Wye fitting with two branched conical cross.
takeoffs
RectRectTap "Rect Tap" Rectangular Tap — The outlet of the tap connects to the rectangular branch duct for down streaming of the air.
RectOvlTakeoff RectToOvl Takeoff Rectangular To Oval — Useful where small portion of the flow needs to be diverted in the oval branch duct.
RectRndTakeoff RectToRnd Takeoff Rectangular To Round — Allows fitting to be mounted to Rectangular duct with improved air flow. Used for transition from air plenums or rectangular duct to round pipe or insulated duct.
RectRoundTap "Round Tap" Round Tap On Rectangular Duct — Used for transition from rectangular duct to round pipe or insulated flexible duct. Adjustable inclined angle. Useful when branch ducts are to be located within a joist space.
RectOvalTap "Oval Tap" Oval Tap On Rectangular Duct — Used for transition from rectangular duct to oval pipe or insulated flexible duct. Adjustable inclined angle. Forms a transition from rectangular to oval branch duct.
RectangularTakeoff Angled Rectangular Angled Takeoff — Angled takeoff routes can be connected with fitting having rectangular inlets.
RectangularTakeoffRadius "Radius 1" Rectangular Takeoff Radius 1 — The angular curvature of the side of the branch is controlled with the value of primary radius.
RectangularTakeoffRadius "Radius 2" Rectangular Takeoff Radius 2 — Additionally, the secondary radius defines the curvature of another side of the branch.
RectangularTakeoffRadius "Radius 3" Rectangular Takeoff Radius 3 — Both radius values define the curvature of sides of branch.
RndTakeoff Default Round Takeoff — Round takeoff branching straight on the wall of round duct.
RndTakeoff Conical Round Conical Takeoff — Round conical outlet branched out perpendicular to the wall of round duct. The outlet diameter determines the reducing effect in the conical branch, thereby maintain the flow of different pressure conditions. Suitable for connecting HVAC equipments, like VAV in the round and rectangular duct routes.
RoundRoundTap "Round Tap" Round Tap — Round tap outlet branched out in an inclined angle on the wall of round duct.
SaddleTap Tap Saddle Tap/TakeOff — Saddle Take Off useful for remodeling. Used for starting branch duct runs from round pipe trunk or branch lines in HVAC air duct systems.
RndRectTakeoff RndToRect Takeoff Round To Rectangular — Rectangular takeoff branching straight on the wall of round duct, used to connect fittings in the air handling system.
RoundRectTap "Rect Tap" Rectangular Tap on Round Duct — Rectangular takeoff branching out in an inclined angle on the wall of round duct.
RndOvlTakeoff RndToOvl Takeoff Round To Oval — Takeoff branching an oval outlet on the wall of round duct.
RoundOvalTap "Oval Tap" Oval Tap on Round Duct — Oval tap outlet branched out in an inclined angle on the wall of round duct.
OvlTakeoff Default Oval Takeoff — Oval takeoff branching straight on the wall of oval duct.
OvalOvalTap "Oval Tap" Oval Tap — Oval tap outlet branched out in an inclined angle on the wall of oval duct.
OvlRndTakeoff OvlToRnd Takeoff Oval Duct To Round — Round takeoff branching straight on the wall of oval duct, used to connect fittings having round inlets.
OvalRoundTap "Round Tap" Round Tap on Oval Duct — Round takeoff branching out in an inclined angle on the wall of oval duct.
OvlRectTakeoff OvlToRect Takeoff Oval Duct To Rectangular Branch — Rectangular takeoff branching straight on the wall of oval duct, used to connect fittings in the air handling system having rectangular inlets
OvalRectTap "Rect Tap" Rectangular Tap on Oval Duct — Rectangular tap outlet branched out in an inclined angle on the wall of oval duct.