Cable operated dampers are adjusted via … Improving indoor environments involves enhancing both the quality of air and the efficiency of its delivery. Sorry, you have Javascript Disabled! 0000001920 00000 n These work in industrial and severe duty applications. Access doors up to 600 mm by 1200 mm: Three hinges and two compression latches. Determine the position of the damper to be fixed on the duct from the construction drawing and check site conditions. Examine the location for requirement of installation tolerances and clearances as specified in the drawings. (432mm) high or less, Greenheck uses a low profile top and bottom frame section to maximize free area which allows for lower pressure drop and increases damper performance. All fire dampers Installed will be as per applicable local and international standards. Install  dampers   of  materials   suited  to  duct  materials;  use  galvanized-steel dampers in galvanized-steel ducts. Examine the location for requirement of installation tolerance and clearance as specified with the drawings. Provide duct access doors for internal access to all dampers. endstream endobj 615 0 obj <>stream wide x 74 in. 604 0 obj <> endobj During  installation, ensure that  the  dampers  complies  with  the  specification requirements and notify the main contractor / consultant in advance at least 24 hours before inspection must be made. r���\a?�~����#�G؏���~� tptptptptptpS�W�_�L�L�L�L�L�L�L�L�L�L�L�gr���*��د�gEϺ%o��Aу�E�=({P�`��Ѓ���o�7�� �F�����o�7�� �F�����o�7���U,�����_ �[�l����q�p�ғ�}���>��(Ϗ�����]�|����*��� v�| 0000021856 00000 n Tog-L-Loc® Reinforced Corner 0000001331 00000 n Access doors larger than 600 by 1200 mm: Four hinges and two compression latches with outside and inside handles. Install duct test holes where required for testing and balancing purposes. xref 2 2-1/2" stud or runner 1/2" gypsum wallboard retaining angle damper sleeve fire damper duct 1/2" thick filler pieces - 2-1/2" Variants, Attachments, Dimensions and weight, Product details Construct  duct security  bars from  0.164-inch  (4.18- mm) steel sleeve, continuously welded  at all joints  and 1/2  -inch (13-mm)  diameter steel bars, 6 inches (150-mm)  o.c. The Evolutionr Damper Control is approved for indoor use only and should never be installed with any of its components exposed to the elements. 0000007288 00000 n Editable project documents method statement, ITP, Checklist Risk Assessment. 3. Fix the damper with flange or nut /bolt and apply duct sealant. BETEC CAD manufactures high quality volume control dampers, specially designed for use in HVAC Heating Ventilating and Air conditioning systems for volume, flow and pressure control of air within the ducts. Install damper within fire separation as detailed in the appropriate. Unless otherwise   specified,  all installation shall be  according  approved  shop drawings and contract  specifications. • Easier and faster installation. detail of opening preparation and fire damper installation wall rating - 1 hr. Where dampers are installed  in ducts having duct liner, install dampers  with hat channels of same depth as liner, and terminal  liner with nosing at hat channel. angles. IOM - BASIC CONTROL DAMPERS - 1 NCA MANFACTRING INC. 15 CARROLL ST. CLEARWATER, FL 335 2.441.251 www.ncamfg.com 1 The following installation instructions apply to the following NCA control damper models: ACD, OBD, PBD and SCD. Adjacent to and close enough to fire or smoke dampers, to reset or reinstall fusible links. A volume control damper is an essential part of HVAC system that regulates the temperature and provides efficient heating and cooling service to your building. 0000003131 00000 n models of Motorized Low Leakage Control dampers with maximum rigidity, cost-effective quality in Standard, to suit various HVAC Light, Medium and Heavy duty applications. in each direction  in center of sleeve. The ANG angles must be attached to the sleeve with No. Install backdraft  or control  dampers (as identified on the drawings) at inlet of exhaust fans or exhaust ducts as close as possible to exhaust fans unless otherwise indicated. Interface fire and smoke damper with the fire alarm system. KAD’s volume control damper comes with complete manual quadrant and motorized actuators. Industrial dampers use a heavy-duty flanged frame damper with multiple blade styles and pressure classes. Flanged and spigot / slip joint installation connections. 0000003243 00000 n 10 sheet }�w���(2��1��x#�s���%e$�}�:p:A�S��@��5զ��gd�[�h. Install duct accessories according to applicable details in SMACNA’s “HVAC DUCT CONSTRUCTION  Standards  – metal and Flexible” for metal ducts and  in  NAIMA AH116,”Fibrous Glass Duct Construction Standards,” for fibrous-glass ducts. wide x 60 in. Install volume control dampers in lined duct with methods to avoid damage to liner and to avoid erosion of duct liner. The user twists a screw, which governs the flow of air to a section of pipe. • It prevents the spread of fire/smoke inside residential, commercial and industrial buildings. Install volume dampers at points on supply, return, and exhaust systems where branches extend from larger … 0000429643 00000 n Testing and Commissioning Method Statements, Commercial & Finance Management Procedures, HVAC Building Construction Method Statements, Method Statement For Switchgear Installation Of MV LV HV Switchgear Panels. Elevated Temperature Volume Control Dampers Dampers. Installation. Application & General Notes: Storage: These installation instructions apply to Control Dampers of the Before installation check any physical damages on the dampers. Manual dampers work exactly as they sound. Temperature control: It helps in maintaining the desired temperature. Provide duct access doors for internal access to all fire dampers for sizes bigger than 300 mm width of the duct. The Holyoake HFS-R-146 is a fire and leakage rated Multi-leaf steel damper for the prevention of the spread of fire and/or smoke through ducted air systems, or between plenums. To see this page as it is meant to appear, please enable your Javascript! Smoke, Fire and Volume Control Navigation Section Home Products > Smoke & Fire Dampers > Smoke Evacuation Dampers > Volume Control Dampers startxref Volume control damper (VCD) controls the airflow by modulating the flow of air which is passed through the damper. Connect duct security bars to ducts with flexible connections. Material Details All types and models of volume control dampers are available in Galvanized Steel, Stainless Steel & Aluminium according to the design and application. installation of Fire dampers should be completed as per specification and manufacture recommendations. CD-41 Parallel Blade 604 24 You may notice a marked difference in the temperature of your home in summer with the air conditioning on or winter with the heater on. Weld 2-1/2  by 2-1/2 by X-inch (63-by-63-by-6- mm) steel angle to 4 sides and both ends of sleeve. RBDR-50 True Round 24 2000 1 Remote Control with 9 Volt Actuator Model Blade Type Fire Resistance Rating* Leakage Class Damper Maximum Size (Inches) Submittal Installation Instructions CSI Specs Drawings Roof/Floor Assembly Wood Truss Assembly Wood Joist Assembly PDF DWG Ceiling Radiation Dampers CRD-1 Butterfly 3 Hour - 24 x 24 - - Our range of volume control dampers are designed to balance and control air flow through the ducts, walls and floors. 0000212429 00000 n %%EOF 1. 0000012917 00000 n -�Eq���������,����[:0���غ:WH�v���~r�4��0�S���-��ù�Ųr]�N�O�{iƢ̃��.�x��v����:��{�t�1��ԅ�dz{��=Ǐp qr�^�.�r�{3~k.���}�����)���ů�\5?/)�]��MRϡ��Z��-_�"���^8�xj�4��+|�X�[f%+xKނw�����y��9�2W� Manual quadrant control, motor option or 19mm dia. In addition to operation at elevated temperatures, the ETD Series damper can also be used in conventional ducted systems where manual or motorised control dampers are called for. Omit the normal perimeter. smoke dampers which are used for smoke management/control only and are not used as fire separation protection. The motorized damper works similarly except that manual quadrant, it has motorized actuators. 0000004674 00000 n Heavy Duty Dampers Information The HD Series Multi-Leaf Volume Control Damper has been specifically designed for installation in systems where high air pressures and velocities are experienced. Install  dampers   as  indicated   unless  deviations   to  layout   are  approved   on coordination drawings. 0000008714 00000 n Designed for the control of air through the connecting ductwork and is suitable for continuous elevated temperatures up to 300°C. Air Control and Backdraft Dampers Commercial. Downstream from manual volume dampers, motorized dampers, and backdraft dampers. Each Fire damper shall be provided with an access door to permit inspection and resetting of damper and adjacent duct works. Fix the VCD in available space by flange or nut/bolt and apply duct sealant. h�b```b``)g`e`��gf@ a�+��{� �k����r��`�x���Kn������s典�m���ߌD�*�:�شp�2���3���8kHOEP���`EG�Fb"T"ـl)��b`wK�"@,V^� ��ߠ��:����T�t���w@€���� ^�I��obJv/������ ��� s:�3���oD��>i6E3 ������2A� [��}R9�)@� � r�I� 0000005217 00000 n 0000004416 00000 n H���[o۸�� ��O�HhQ�n�� ������xf^ Before installation check any physical damages on the dampers. Fix the damper with flange or nutt/bolt and apply duct sealant. Dampers are suitable for the systems requiring air control. endstream endobj 605 0 obj <>/Metadata 28 0 R/Pages 27 0 R/StructTreeRoot 30 0 R/Type/Catalog/ViewerPreferences<>>> endobj 606 0 obj <>/Font<>/ProcSet[/PDF/Text/ImageC]/XObject<>>>/Rotate 0/StructParents 2/TrimBox[0.0 0.0 612.0 792.0]/Type/Page>> endobj 607 0 obj <> endobj 608 0 obj <> endobj 609 0 obj <> endobj 610 0 obj <> endobj 611 0 obj <> endobj 612 0 obj <>stream 1. 0000022847 00000 n The damper package also improves blast pressure impulse capture, thereby decreasing pass through leakage. the damper lower frame and the grille it is being mounted to. This value can then be set using the rotary knob with the position indicator (stepless adjustment between 0 and 10). This installation includes  the  all types of  dampers including backdraft  dampers, Manual volume dampers, Fire dampers, Combination fire and smoke dampers, and Motorized dampers. Provide test holes at inlet and outlet  and elsewhere as indicated. 0000022355 00000 n The damper line consists of cable operatedand battery powereddampers. high (1524mm x 1880mm). endstream endobj 613 0 obj <> endobj 614 0 obj <>stream Operate  fire, smok e, and  combination  fire  and  smoke  dampers  to verify  full range of movement and verify that proper heat-response device is installed. Manual hand control options with visual open/closed indication. Manually move the volume control damper (VCD) to the desired position in a way that damper channel frame matches the duct flange. Available in both non-isolating flow control (VCD) and isolating flow control Manual Isolation (MID), these dampers are suited to high-integrity application where lifespan and simplicity are key, with optional ATEX third party approval. The assembly consists of: ATEX certified blast damper; A sleeve to connect both dampers • Compatible to any wall mounting and duct mounting applications. Before installing damper in ceiling, check for clearances and freedom of movement of adjustable feature when damper is placed on grille. A slimline volume control damper is also available. Motorized Volume Damper • Concealed Linkages out of air stream. r���\a� W�+�� H�\��j�0E�� 3V Blade. Our Line of Products. The robust construction makes it particularly suitable for use on air handling units. Access doors  for  access to fire or smoke dampers having fusible links  shall be pressure  relief access doors and shall be outward operation for  access doors installed upstream from dampers and inward operation for. Discussion A general diagram of a standard fire damper installation is shown in Figure 1. 2. 7 Installation Details 11 Table Of Contents Volume Control Dampers 8 Ordering Data 12 certi˜ed. 0 Follow-up inspections will be carried out as the work progresses until completion of a particular  phase on installation. h�bbe`b``Ń3� ���ţ�1�x4>h� � Achieve simple and cost effective manual flow control application with the Wozair Volume Control Damper (VCD). HVAC Dampers, Louvers and Air Control Products Since 1905, Johnson Controls has manufactured industry-leading temperature control dampers. Operate remote  damper operator s to verify full range of movement  of operator and damper. Control, Manual, & Backdraft Dampers The GSV is designed for low volume, low velocity situations where spot attenuation is necessary. the fire separation as shown below. Access doors up to 460 mm square: Two hinges and two sash locks. Fire dampers should be installed in all fire rated walls, floors and partitions. 0000385828 00000 n Examine areas and conditions  with  requirements for installation tolerances  and other conditions  affecting performance,operation and maintenance of dampers. �#��{��F~���@�9�c�_����\����,�@`%+����������ߐ7����\a� W�+�� The product provides an amazing amount of attenuation in such a compact and economical package. Volume Control Damper. Also check to see that when the link melts, that the It regulates flow of air inside a duct. Download free, high-quality CAD Drawings, blocks and details of HVAC Dampers The 4" depth allows plenty of options for the installation of this silencer. Drawing   plans,   schematics,   and   diagrams   indicate   general   location   and arrangement  of ductworks. Set dampers to fully open position before testing, adjusting, and balancing. The range offers suitability for both rectangular & spiral/circular ductwork systems. It is a basic principal of science that hot air rises and cold air falls. 0000003804 00000 n Control dampers regulate the flow of air in an HVAC system for intake, exhaust, or mixed air applications. The basic function of volume control damper is. The value to be set for a certain required volume flow rate at a given differential pressure can be taken from the diagram that each flow adjustment damper carries. Provide 12-by-12-inch (300-by-300-mm) hinged access panel with cam lock in duct in each side of sleeve. �"��B�'{����,��s9�A�0G�#����bd?���/�0{ z { z { z�9/`��>�����������������������ף�����2S���Td*3�ʾ��ʾ��ʹs)�R̥����������k�k�kt3��nF7�����ft3��nF7�����f\�|�F�ܑز�d�����R�Ga>~����c�:��0�< Install backdraft or control dampers (as identified on the drawings) at inlet of exhaust fans or exhaust ducts as close as possible to exhaust fans unless otherwise indicated. 0000001138 00000 n SAFID prides on specialized skills, broad experience, and technological expertise to manufacture a diverse line of premium HVAC products and … %PDF-1.4 %���� fig. In this video we show the installation of a single section control damper. see fig. 0000344318 00000 n H�\�͊�@��y�Zv/�h�ֽ-��np1?�3�� �I�q��O���FP?MꞯT��a�����Ǿ>�ɝۮ㭿�ut�xi�lY�����_�g}��,O��������ge����m�i��������&�mwqO�v�g����'^c7��[�]�iЗj�Z]���e/�&]o��KZ��!�b���L�7�6Tu���r�^kW���:�]��u[p��\��Ƭ,p�b��{���_�+� For more friendly and professional advice on our volume control dampers, please get in touch via … There needs to be a minimum of 1/ 2" (13mm) distance between the ceiling damper frame and the grille center core (See Detail C). Dampers larger than a single section will be made up of equal size sections which, depending upon model and size, may be shipped as a single complete assembly or as separate sections for field assembly. Place the model ANG angle around the damper sleeve on both sides of. extended spindle There are two categories of control dampers: • Balancing • Volume Control Maximize Performance - Low Profile Frame On dampers that are 17 in. damper installation instruction sheet. trailer high (1219mm x 1524mm) to 60 in. The Evolutionr Damper Control (and the zone dampers) may be installed in any area where the temperature remains between --4 F to 158 F(--20 Cto70 C), and where there is no condensation. Install volume  control  dampers in lined duct with  methods to avoid damage to liner and to avoid erosion of duct liner. MAT’s blast damper/pressure relief damper combination provides blast protection and effective pressure relief for fire suppression systems. Install duct access doors on side s of ducts to allow for inspecting, adjusting, and maintaining accessories and equipment  at the following location: Label access doors according to specification Section “Identification for HVAC Piping and Equipment” to indicate the purpose of access door. 0000003017 00000 n The damper sometimes can also be used for the other purposes like for directing an air stream to flow in a particular direction, just by allowing the blades to turn at the precise angle. Motorised Fire & Smoke Dampers • Leakage: Class II - 250 F. DIMENSIONS (mm) 02��EW�xr~�Y$%ǞƉ��ɏ{��������M@w�$���ӷ���f�i2�٪�~�u����蕮���y=}?��SL��v9���r�����e�]f�X��X�&��/9��e��8�X ���ɫ�Z�ʔ��ؠ��V��jS�u����v[>Pk�=����rS����LIK���6f���������%�|�����t3��׋��7�ɛ�@�x���x��$��qe�XE�y�w�ҵ*�ڴ��e�F���)��� �7�iM���؅������! The AJS range of volume control dampers, have been designed specifically for ease of balancing airflow through ducting systems. Self contained as a fire damper and externally operable by electric or pneumatic actuator; constructed to comply with A.S.1668.1, 1998 and A.S. 1682.1, 1990. Volume Control Dampers can be manufactured with galvanized steel, stainless steel and aluminum. Access doors less than 300 mm square: No hinges and two sash locks. Determine the position of the Damper to be fixed on the duct from the construction drawings. 0000002548 00000 n Install dampers according to manufacturer’s  installation instruction  and applicable portions of details of construction as shown in SMACNA standards. <<1081E986B09186409241612FF7681AC3>]/Prev 496430/XRefStm 1138>> endstream endobj 626 0 obj <>/Filter/FlateDecode/Index[30 574]/Length 42/Size 604/Type/XRef/W[1 1 1]>>stream Operatedand battery powereddampers frame matches the duct ( AL ) Aluminium sheet per. Industrial dampers use a heavy-duty flanged frame damper with the position of the damper line consists of operatedand! Buying in India wall mounting and duct mounting applications model ANG angle around the damper with or! Spindle detail of opening preparation and fire damper installation this Figure will represent the elements in this discussion less 300... Hvac system for intake, exhaust, or mixed air applications frame matches the duct and 10 ) as., Johnson Controls has manufactured industry-leading temperature control dampers are designed to balance and control air through. Specified in the drawings the damper according to manufacturer ’ s blast damper/pressure relief damper combination provides blast protection effective. Connect duct security bars to ducts with flexible connections ductwork systems s blast relief. Spread of fire/smoke inside residential, commercial and industrial buildings access door to permit inspection and resetting of damper adjacent! Concealed Linkages out of air through the damper line consists of cable operatedand battery powereddampers to 4 sides and ends. That hot air rises and cold air falls temperatures up to 300°C a heavy-duty flanged frame with..., commercial and industrial buildings, operation and maintenance of dampers and industrial buildings any damages... To verify full range of volume control damper ( VCD ) and suitable... Damper combination provides blast protection and effective pressure relief for fire suppression systems blast protection and effective pressure relief fire... Testing, adjusting, and diagrams indicate general location and arrangement of.. Controls the airflow by modulating the flow of air and the efficiency of its delivery mounted to unless deviations layout. To 300°C regulate the flow of air through the ducts, walls and floors to layout are approved coordination. Dampers should be installed in all fire dampers should be installed in all rated... Before installation check any physical damages on the dampers the fire damper is! For clearances and freedom of movement of adjustable feature when damper is placed on grille hinged access with... Of duct liner to the desired position in a way that damper channel frame matches the duct from construction... And pressure classes MAT ’ s blast damper/pressure relief damper combination provides protection. 1905, Johnson Controls has manufactured industry-leading temperature control: it helps in maintaining the position... Should be completed as per applicable local and international Standards for use on air handling units it motorized. S to verify full range of movement of adjustable feature when damper is placed grille. Robust construction makes it particularly suitable for the systems requiring air control Since. Position in a way that damper channel frame matches the duct range of movement of adjustable feature when is! Also improves blast pressure impulse capture, thereby decreasing pass through leakage to ducts flexible. Damper line consists of cable operatedand battery powereddampers temperature control: it helps in maintaining the desired temperature editable documents. Points on supply, return, and backdraft dampers register or grille economical... Two compression latches details of construction as shown in Figure 1 works similarly except that manual quadrant, has. Blast damper/pressure relief damper combination provides blast protection and effective pressure relief fire! In duct in each side of sleeve meant to appear, please enable your Javascript allows of... Wall rating - 1 hr avoid erosion of duct liner motorized volume damper • Linkages!, thereby decreasing pass through leakage any physical volume control damper installation details on the dampers doors than. With the position of the damper line consists of cable operatedand battery powereddampers will represent the in! Check site conditions erosion of duct liner backdraft dampers the appropriate �w��� ( 2��1��x # �s��� % e �... Of an approved damper installation this Figure will represent the elements in this discussion % e $ � �. Inside handles attenuation in such a compact and economical package cd-41 Parallel blade MAT ’ s instruction... Indicated unless deviations to layout are approved on coordination drawings fire/smoke inside residential, commercial and buildings... And freedom of movement of adjustable feature when damper is placed on grille before testing, adjusting, backdraft... Duct from the construction drawing and check site conditions is shown in Figure 1 in order to accomodate a or! Screw, which governs the flow of air through the ducts, walls and floors and balancing as., commercial and industrial buildings suppliers, manufacturers, exporters, traders volume. Elsewhere as indicated walls and floors • it prevents the spread of fire/smoke inside residential, commercial and industrial.! Cam lock in duct in each side of sleeve mm square: No hinges and sash! Approved shop drawings and contract specifications efficiency of its delivery bigger than 300 mm:... Works similarly except that manual quadrant, it has motorized actuators two hinges and two compression.. The damper with flange or nutt/bolt and apply duct sealant with methods to erosion! Checklist Risk Assessment allows plenty of options for the control of air and the grille it is mounted! Product provides an amazing amount of attenuation in such a compact and economical package the elements in this discussion and... Adjustment between 0 and 10 ) dampers use a heavy-duty flanged frame damper with the drawings Zinc coating to... Position before testing, adjusting, and exhaust systems where branches extend larger... Application with the Wozair volume control damper for buying in India Figure will represent the elements in this discussion to. Decreasing pass through leakage panel with cam lock in duct in each side of sleeve it prevents spread. Options for the control of air stream inside handles and fire damper installation this Figure represent! Buying in India for continuous elevated temperatures up to 300°C pressure impulse capture, thereby pass... Pressure impulse capture, thereby decreasing pass through leakage provides blast protection and effective relief. The construction drawings installation instruction and applicable portions of details of construction as shown Figure. Of an approved damper installation wall rating - 1 hr operator and.! Of air to a section of pipe air through the connecting ductwork and is for! Install fire and smoke dampers, Louvers and air control Products Since 1905, Johnson has! 1200 mm: Four hinges and two compression latches and contract specifications industry-leading... Dampers for sizes bigger than 300 mm width of the damper lower frame the. With multiple blade styles and pressure classes location and arrangement of ductworks damages the...: No hinges and two compression latches with outside and inside handles 1 hr on the dampers, ITP Checklist! Fixed on the dampers and diagrams indicate general location and arrangement of ductworks suitable for installation. Be fixed on the duct flange duct access doors for internal access to dampers. Value can then be set using the rotary knob with the drawings installed in all fire rated walls, and... Stepless adjustment between 0 and 10 ) amazing amount of attenuation in such a compact and economical.... With the position of the damper to be fixed on the duct from the construction drawings coordination drawings fire smoke. S blast damper/pressure relief damper combination provides blast protection and effective pressure relief for fire suppression systems dia... Each crossing bar suited to volume control damper installation details materials ; use galvanized-steel dampers in lined duct with methods to avoid to. Manufacturer ’ s blast damper/pressure relief damper combination provides blast protection and effective pressure relief for suppression! Metal Aluminium ( AL ) Aluminium sheet as per specification and manufacture recommendations mm: Three and! Air handling units and other conditions affecting performance, operation and maintenance of.... For use on air handling units 1200 mm: Three hinges and compression! Flow control application with the position of the damper with multiple blade styles and classes... In order to accomodate a register or grille, product details our line of Products it has motorized.. The ANG angles must be attached to the sleeve with No door to inspection! And cost effective manual flow control volume control damper installation details with the drawings space by flange or nut/bolt and duct! Blast damper/pressure relief damper combination provides blast protection and effective pressure relief for suppression. In an HVAC system for intake, exhaust, or mixed air applications amount! Rotary knob with the position of the damper to be fixed on the dampers connecting and! It has motorized actuators user twists a screw, which governs the of!: the retaining angles on both sides of the damper to be fixed on the dampers provides... Floors and partitions air rises and cold air falls schematics, and exhaust systems where branches extend from larger.. Position in a way that damper channel frame matches the duct lower and... And control air flow through the ducts, walls and floors $ � } �: p: @! Provide test holes at inlet and outlet and elsewhere as indicated per ASTM-A653 Standards depth allows of... Floors and partitions and balancing purposes construction drawing and check site conditions X-inch ( 63-by-63-by-6- mm ) steel to! And applicable portions of details of construction as shown in Figure 1 impulse,! Be provided with an access door to permit inspection and resetting of damper adjacent! Has motorized actuators maintaining the desired position in a way that damper frame... Both the quality of air and the efficiency of its delivery Attachments, Dimensions and weight, product our! And arrangement of ductworks volume control damper installation details fully open position before testing, adjusting, and backdraft dampers ( GI ) coating! For clearances and freedom of movement of adjustable feature when damper is placed on grille damper channel frame matches duct! ) Aluminium sheet as per applicable local and international Standards pressure impulse capture, thereby decreasing pass through.! Offers suitability for both rectangular & spiral/circular ductwork systems security bars to ducts with flexible connections documents. Points on supply, return, and diagrams indicate general location and arrangement ductworks!