build an adapter to reduce duct to 10x10 (alternatively I can use 12x12 damper and build adapter to enlarge duct to 12x12). We offer a large selection with great prices on all range hoods products. Installation and Maintenance Do not compress or stretch the damper frame into the duct or opening. HVAC for BEGINNERS: DUCTWORK BASICS Rectangular Ells, Tees, and Reducers. This motorized damper features spring open 2 wire design for easy installation. flanged breakaway connection. Damper Sleeves. The motor is ready for installation! Use two M3 screws to secure the damper to the printer. That way, it's possible to regulate the airflow by adjusting the position of the damper. 12" x 8" Rectangular Duct Volume Damper. While there are other elements of an approved damper installation this figure will represent the elements in this discussion. Round and rectangular gear driven blastgates, chainfall and motor driven Actuation We also offer a wide variety of actuation products including, manual, gear driven, electric or pneumatic actuators which can be pre-installed and tested to insure the proper functioning, speed of operation, and proper preload against blade stops. Attic Ductwork Installation Recently I've installed ductwork in the attic space. Halton FDR - Rectangular Fire Damper The Halton FDR is a fire damper for rectangular or large circular ducts. The Duct Dampers we offer is widely demanded by the clients for their durable use. This allows the air to get into the return air duct. Inspect the ductwork (or the opening where the damper will be installed) for any obstruction or irregularity that might interfere with mounting the actuator or rotating the blades or linkage. 12" x 12" (305 x 305) ceiling radiation damper could have a max-imum ceiling membrane opening of 13" x 13" (330 x 330). 8" X 8" thru 24" X 24" New & Improved Heavy-Duty Aluminum rectangular damper w/ Ecojay by Belimo motor Built to stand up to use and abuse SPEC SHEET SHIPPING TIME: 2 Weeks (because they are made to order) RETURNS for rectangular dampers require 35% restocking fee b. (See Figure 3) 4. LOW LEAKAGE DAMPERS. Learn how to install a range hood. Find range hood duct transitions and other accessories at VentingDirect. 61) coated steel, or larger sleeves of not less than 14 gauge (1. *Single Quad Damper **Double Quad Damper ***Heavy Duty Damper (click here for dampers). Prior to installation, manually test all dampers for blade closure and operation. Manual balancing dampers, typically found in round HVAC ducts in sizes ranging from 4 to 10 inches, don’t tend to wear out. Each damper is made to your specifications. - Supporting ducts in a proper and durable fashion helps maintain duct system efficiency. Installation Tip — To install HVAC Damper Sleeves, you simply slide the sleeve into the item you are attaching to and fasted with sheet metal screws or duct tape. The DUCTSD 4-wire photoelectric duct smoke detector features a pivoting housing that fits both square and rectangular footprints and mounts to round or rectangular ductwork. Below are listed the ten Metal-Fab fire damper model numbers and a brief description of each. If the insulation on the central heating and cooling ductwork in your house has seen better days, consider replacing or upgrading it to improve energy efficiency and reduce your utility bills. Seal the new flex duct to the new box with plastic ties, keeping the connection between the duct and the box as tight as possible. This Home Depot guide provides a step-by-step procedure to install a range hood to remove smoke, odor and heat from the kitchen. Air Balancing Dampers. This damper is easy to install and easy to checkout. Therefore, I choose to replace the main runs of flex duct from the supply air plenum to the duct board distribution trunks with rigid round sheet metal duct. Learn how to install a range hood. Dampers are placed on correct workset that is activated, visibility graphics have it on. HVAC Air Duct Dampers. In any system, the damper dimensions must be appropriate for the designed airflow volume. Ask questions and measure your duct carefully and ensure you order the correct size. This product is supplied in Revit (. Looking for DAYTON Fire Damper, Static, Vertical Mounting Type, 1-1/2 hr. Do not use less than a 6″diameter duct. The Master Flow Air-Tite 10 in. • To provide efficient performance, length of vent system and number of elbows should be kept to minimum. We are recommended by the clients for offering a quality tested array of Duct Dampers. Langdon has the ability to construct industrial ductwork used in exhaust, dust-collection and air-pollution control systems. The damper is in place to secure the integrity of the rated barrier in the event of heat or flames around 165 degrees F. A Damper consists of a plate that stops or regulates the flow of air inside a Duct, Chimney, VAV Box, Air Handler or other air handling equipment. The Aprilaire 6724 - Rectangular Vent Damper 8"x 14" is a rectangular duct damper. 0 DUCT CONSTRUCTION. • Seal all ducts with mastic paste. * IMPORTANT: If a rectangular-to-round transition adaptor is used, the bottom corners of the damper will have to be cut to fit, using the tin snips, in order to allow free movement of the damper. Honeywell ZD8X16TZ - 8 in. • Installation in separating concrete or masonry walls. Install the cleats equally spaced in quantities per the chart provided above. Related Products MidwestDucts 18" x 8" Rectangular Ductwork Volume Damper $4. Imperial Group is an award-winning manufacturer of more than 7,000 heating, air conditioning, ventilation and building products for residential and light commercial applications. All dampers have a housing made of 4 aluminium profiles and a closure consisting of aluminium. The motor is ready for installation! Use two M3 screws to secure the damper to the printer. How much should I budget for the duct work and damper unit? Are booster exhaust fans really necessary to make sure the damper opens properly? Kevin Y. Adjustment device with rotary pointer, scale and lock for the volume flow rate set point and can be adjusted manually or by actuator. Refer to the latest edition of NFPA 90A. to mate with standard 3 1/4 inch x 10 inch rectangular duct. 47 - $1,929. Instead, they install a recirculating range hood fan with a charcoal filter. ) Some Passivhaus builders don't install a range hood fan that is ducted outdoors. Visit The Home Depot to buy Speedi-Products 3. Manual balancing dampers, typically found in round HVAC ducts in sizes ranging from 4 to 10 inches, don't tend to wear out. HVAC Duct Zone Damper FAQs Diagnostic questions & answers on HVAC zone dampers - Ductwork Zone Dampers & Airflow Controls. IIS - UL APPROVED BREAKAWAY DUCT CONNECTIONS - 0216. Damper Installation. applications • Pressure control • Fan isolation • Combustion air control. Duct & Dampers. The damper’s blade design allows for a lower pressure drop than bubble-tight dampers with circular or oval blade designs. If the installation requires them to actually bring a huge piece of aluminum shaft in your property then help them also. Click here and get free HVAC quotes. MORE DUCTWORK TRANSITIONS Rectangular Side Take-offs and Vertical Ells. Fasten duct to damper with a nylon duct strap, screwing the strap to the pipe to prevent the duct from slipping off. Existing ductwork:If the installation is a retrofit, the existing duct system may limit zone selection options. Inspect the ductwork (or the opening where the damper will be installed) for any obstruction or irregularity that might interfere with mounting the actuator or rotating the blades or linkage. The ZD is typically used with the TrueZONE systems and other electronic zoning systems. Ducts on Demand. Find Range Vent Hood Duct & Venting Parts at RepairClinic. OEM quality damper is sold nationwide under a major HVAC manufacturer's name and is our most popular rectangular damper. Volume Control Dampers regulate the volume of air moving through a duct system. INSTALLATION INSTRUCTIONS DuroZone DD RECTANgULAR PRESSURE RELIEF DAMPERS (DUMPER DAMPERS) TWO COMMON METHODS OF DISCHARgINg AIR 1-Cut a hole in the duct the same size as the damper frame. Per flanged system manufacture's instructions, install the flange system onto the damper sleeve or duct. 20 results for Industrial & Scientific: "rectangular duct damper" Skip to main search results Amazon Prime. I am wondering what is the best method of insulating around the damper adjustment levers. if testing of ducts/returns was code this would be a step in the right direction. RECTANGULAR FLEXDAMPERS. Round Manual Air Balancing Dampers; Rectangular Manual Air Balance Dampers; Cable Control Air Balance Dampers; Pressure Relief By-Pass. Designed for "in-duct" mounting applications to control airflow and provide positive shut-off. Plus, the TrueZONE Damper is built to last, greatly reducing callbacks. Assemble, secure, support and connect duct sections. Rectangular Appliance Wall Vent is designed to fit most range hoods that will be vented outside through a wall. FIRE DAMPER APPLICATION GUIDE FIRE AND CEILING RADIATION DAMPERS Use this application guide to help determine what type of fire damper best suits the application. They can be installed to keep debris, leaves, pest and other materials from entering the duct. This is done without tapes, screws or nylon ties. A fire damper has a lock that is enabled so that you cannot. Herbal Extract Biological Products Others. We carry a number of different air dampers to choose from,. breakaway connection. Features: Features galvanized steel with single-blade damper, which closes off tightly against gasket for minimal leakage. Another option is an in-line fan that you can install in the duct line. were provided (6” damper in a 7” duct – it’s all that was on the truck that day), or where dampers were literally folded in half before installing (you have to wonder if alcohol and/or drugs were involved there). This Home Depot guide provides a step-by-step procedure to install a range hood to remove smoke, odor and heat from the kitchen. A list of options for each. Where metal duct is used, sound transmission can be reduced with flexible duct connections between the fan and the. Various relief air control settings are easily accomplished by a simple adjustment of an integral weighted control lever. Damper is positioned low in the collar to allow it to be positioned so air can be deflected into the take off. Fasten duct to damper with a nylon duct strap, screwing the strap to the pipe to prevent the duct from slipping off. The dampers feature an indicator light that glows green when the damper is open and red when the damper is closed. 9865 Wayne Avenue Cincinnati, Ohio 45215 513-733-5955 www. The ductwork is rectangular sheet-metal ductwork, about 2ft by 2ft cross section (not sure on terminology), perhaps 2-3ft high. *Single Quad Damper **Double Quad Damper ***Heavy Duty Damper (click here for dampers). At the position. If the wall cap is too long, trim it with tin snips. I am having a problem with the rectangular duct dampers disappearing in section view. com: air duct damper. Based on the specified requirements DIMsilencer provides quick, professional sound calculation as well as simple product selection combined with a high degree of user-friendliness. FRONT VIEW 9" TYP. 12" x 12" (305 x 305) ceiling radiation damper could have a max-imum ceiling membrane opening of 13" x 13" (330 x 330). Rectangular Ductwork. 5 of NFPA 80(2013). VariTrac dampers or supply duct branches should be installed downstream of bypass dampers. Type-C Fire Damper: Used in applications where a fire damper. Because heaters and air conditioners are the largest energy consumers in homes today, one way to reduce energy use is to install electronic air duct dampers. Note: This drawing of the Bypass damper, Balancing Hand Damper, and Related duct work is intended to serve only as a guide. Rectangular Single Wall Duct & Fittings for Commercial or Industrial HVAC Ductwork Systems Sheet Metal Connectors, Inc. Product Code Photo Specs Product Description Packed Case Pack CS. RFD sizes go from 6x6 to 24x12. Install dampers so actuator is visible for inspection and accessible in the event it would ever need service. Splitter damper is used to send certain amount of air into specific duct, for example if I want to send 2000cfm into a branch duct which is connected to a main duct, a splitter damper is used. Install damper in fresh air duct only, and as close to the return as possible. 78 per linear foot. BACHMANN employs a unique coupling and counter-weight mechanism to make the design efficient and 100% independent of external drives, thus eliminating the. round duct & fittings - umc standards. Rectangular, Four-Blade, Insulated; Std. Maximum Duct Length: Total duct length. The 509 assembly consists of a rectangular ceiling damper recessed in an internally insulated sheet metal register box (boot) with a round 90° side inlet collar, that accommodates a steel grille or register. Fire dampers (including intumescent) are not suitable for use on protected escape routes because they do not protect the escape route from. Use of turning vanes or splitter vanes. • Possibility of use as an EIS 60 damper with additional duct insulation (as indicated in national building code). The airflow of both examples 1 and 2 can be improved by installing a reducer in the main trunk just past the side branch. installation costs. Your microwave has a 3-1/4 x 10 rectangular duct connection on top. Straight section before WISE Damper in rectangular ducts. Round Cable Operated Damper Installation Instructions > Rectangular Cable Operated Damper Available With Internal or External Mounted Cable. The area below the damper is 52"x17". Information Required for Duct Construction 3. Installation and setup of the dampers is always determined by SHEVS project plans that must comply with the applicable regulations. But, with duct dampers from 1800Ceiling. If you need help finding the right volume control damper for your application, feel free to contact us to learn more. Help those affected by Hurricane Irma, Hurricane Harvey and the California Wildfires by donating today. Call the Factory for unlisted sizes. RECTANGULAR FIBROUS GLASS DUCT WORK 1. 9865 Wayne Avenue Cincinnati, Ohio 45215 513-733-5955 www. You can also adjust the actuator inside of the duct dampers up or down to reduce the duct noises. Description About NCA S900 RSBD - Rectangular single blade Designed to suit small rectangular plastic ducting, increasingly used in domestic applications. Duct Size Upgrade Calculator Minimum duct size recommended is 6” round (or 3 ¼” x 10” rectangular). This ventilation damper is motorized for zone control systems. The size of ductwork affects the amount of airflow and its velocity and is very important in how well the HVAC system operates. For more videos or to ask Shell a question on any home improvement topic, go to http://askshell. The damper line consists of cable operated and battery powered dampers. Greenheck’s Model HBT-221 is the HVAC industry’s first commercial-grade rectangular bubble-tight damper, company officials say. Use the graphic as a guide when planning or designing a Zone system regardless of the Equipment type, Duct layout and Airflow configuration. Rectangular Duct Damper Langdon, Inc. com: air duct damper. This heavy-duty wall vent is made of zinc-coated galvanized steel. Easy online ordering and next-day delivery available with 24/7 expert product support. Install 10" diameter metal ducting, with 1 damper and 1 register per 20 ft. Back to top. The motor is simply the mechanism to operate the damper. Note: This drawing of the Bypass damper, Balancing Hand Damper, and Related duct work is intended to serve only as a guide. In general, however, duct replacement costs an average of $35-$55 per linear foot. Shop ducting and ducting accessories at VentingDirect. I am open to other ideas on how to close off this air volume. INSTALLING METAL DUCT Assembly methods for rectangular duct Installation technique - rectangular metal Assembly methods for round duct Installation technique - round metal Hanging ductwork Sealing metal duct Insulation - internal and external, vapor barriers Assembling for low noise and low pressure drop INSTALLING FLEXIBLE DUCT. Nailor 1500 Series Heavy Duty Control Dampers feature heavy duty galvanized steel U-channel frames, adjustable face linkage, and stainless steel pivot pins which results in smooth operation and easy maintenance. Duct: steel (by others) Installation. Survey the installation application and record the estimated length of ducting required or used for that application. Ductstore is an online store that aims to provide a simple and accessible way of purchasing ventilation and ducting supplies. There are six pre-punched holes for self-tapping screws (provided) to be used to secure the. Aug 14, 2019- Installing new heating or air conditioning duct. Lift or handle dampers using the sleeve or frame. What Is A Damper and What Does It Do? Air duct dampers are also commonly known as HVAC dampers and duct dampers. This is a feature that homeowners will never hear about! Quieter operation and a longer life motor equals NO call backs. 18 A - How are the rectangular dampers installed?. Existing ductwork:If the installation is a retrofit, the existing duct system may limit zone selection options. • Fire resistance class ES 60. The smallest sizes of round dampers have a butterfly type blade while larger ones might be multiblade. There is a pressure differential that causes the duct to be pretty obnoxious sometimes. Easy online ordering and next-day delivery available with 24/7 expert product support. For weather-proof duct connection, install a full-. How to Insulate HVAC Heating and Cooling Ductwork Old paper faced insulation on HVAC ductwork in need of updating. About 95% of these are hvac systems & parts, 1% are valves. Get fair costs for your SPECIFIC project requirements. Use the graphic as a guide when planning or designing a Zone system regardless of the Equipment type, Duct layout and Airflow configuration. Round Duct Air Balancing Dampers; Rectanglar Opposed Blade Air Balance Dampers; Cable Control Air Balance Dampers; Pressure Relief By-Pass. Revitalizaire Heavy-Duty Spring-Loaded Backdraft Damper. Installation Basics When installing your ductwork, only install the ductwork in insulated, or 'conditioned,' spaces. Install the damper into the duct by drilling a hole into the side of the duct and then screw the damper into place. Fusible Link Assembly 6. How To Install Air Ducts And Butterfly Dampers. 18 A - How are the rectangular dampers installed?. Full opening of the damper allows easy cleaning of the ventilation system. Heating: Heating Contractors, HVAC Installation, Types Of Dampers , Fire And Smoke Dampers, Fire Dampers For Ductwork, Round Fire Dampers, Smoker Dampers, Smoke Dampers HVAC, Fire Dampers Regulations, How To Test Fire Dampers, Where Are Fire Smoke Dampers Required, Marine Fire Dampers, Are Fire Dampers Required, When Are Fire Dampers Not. section of aluminum duct at a home center or lumberyard (a 24-in. Dual duct terminal units are for those applications in which the building employs two separate duct systems for heating and cooling, two separate air sources, or a dual duct type air handler that generates hot and cold air. Secure damper assembly with 2 sheet metal screws. The damper is built on a frame made from galvanized steel sheet. The damper can be used for pressure or volume flow regulation with external control options (open, closed, min. RFD sizes go from 6x6 to 24x12. DETAIL B MAINTENANCE RECOMMENDATIONS: NFPA 80 advises that fire dampers be inspected and tested 1 year. Installation Instructions OUTSIDE BACK EXHAUST (EXAMPLE ONLY). Each register should have its own damper that can be accessed for adjustment. Make small adjustments; don't open or close any damper completely. Work toward center of duct using the schedule shown below. Each project package ships to you with a detailed set of installation drawings clearly numbered to accommodate the skill level of any installer. The DSQW-A rectangular multi-blade aluminium dampers can be used to control and isolate air flow in square ductwork. COSMOS is the reliable manufacturer and supplier of duct dampers which includes air distribution duct damper, aluminum duct damper, galvanized duct damper, motorized air. Home / Duct Dampers / Zone Dampers: Rectangular / 3 Wire Power Open Power Close. And most of the Broan range hoods can also vent to a 3. Installing new heating or air conditioning duct. Herbal Extract Biological Products Others. (SMC) TDC, Slip/Drive and Raw Sheet Metal Connectors, Inc. Reattach blower motor to back of microwave oven with 2 screws removed in Step 3. The third type, shown here, is a recessed fan that fits into the duct and is flush with the floor. It also produces less noise, which can be a nuisance to the occupants of the room. CADvent Enabler. HVAC Express vents, dampers and ducting accessories are made in the USA and include Manual Duct Damper - Spool Damper -10 Inch (GSD 10). 8" X 8" thru 24" X 24" New & Improved Heavy-Duty Aluminum rectangular damper w/ Ecojay by Belimo motor Built to stand up to use and abuse SPEC SHEET SHIPPING TIME: 2 Weeks (because they are made to order) RETURNS for rectangular dampers require 35% restocking fee b. Insert cleat into tool, hook onto mated frames near corner (do not attempt to apply onto corner clips), apply pressure to handle so Cleater tool compresses frames and cleat snaps on. The damper line consists of cable operated and battery powered dampers. Non-return dampers prevent unwanted airflows against the intended airflow direction when the system is not in operation Maximum differential pressure: 100 Pa Casing with U-channel connection suitable for rectangular ducts. Although such problems may require repositioning ductwork, or adding booster fans -- the first thing to check is that the ductwork is balanced and balanced differently for the two. Rectangular Duct Products; Venting Products; Duct Size Calculator; Commercial. CB M3 Pce Wt. floor duct. Fire dampers of certain rated hours installed in a supply air duct in a fire rated partition supplying air from fire zone to non fire zone, is necessary in order to prevent spreading of fire from the source that is fire hazardous zone to another room which is not a fire zone. Constant Force Spring 4. How can I fix this? It looks like gaskets are produced for rectangular blade dampers, but not for round dampers. Round ductwork is ideal for directing the air that has a low-pressure drop. 365 day right part guaranteed return policy. applications • Pressure control • Fan isolation • Combustion air control. To qualify for expedited shipping Zoro must receive your order before 3:00PM CST Monday–Friday; all orders must weigh less than 150 lbs, and not contain any hazardous materials. In addition, we offer take-offs, elbows, round duct pipe, and register boots that can be connected to the starting ductwork and run to each room. installation with grille. FOR DIVERSE APPLICATIONS Rectangular fire damper for the isolation of duct penetrations between fire compartments, for a variety of installation situations, available in many different sizes and constructions Nominal sizes 200 × 200 – 1500 × 800 mm, in increments of 1 mm Low differential pressure and sound power level Explosion-proof construction (ATEX) as an option Can also be used as an air transfer damper Optional stainless steel casing or powder-coated casing for increased corrosion. (They need to be able to open easily when the fan starts up. Inspect the ductwork (or the opening where the damper will be installed) for any obstruction or irregularity that might interfere with mounting the actuator or rotating the blades or linkage. The ZD is a power close and spring open damper. I and install dampers in an easily accessible Iœation for Scrvicc and Chcckout 2. Damper Accessory Kits and Replacement Parts Product Bulletin 3 DMPR-KC009 Blade Position Indicator This switch kit senses the open and closed position of the damper blade and provides a feedback signal to a controller. The damper blades are in the end sealed with a gasket made from synthetic material. Rectangular Ductwork, Plenums, and Takeoffs Select from the menu below to view any of our product lines. The iO-SPC maintains the system static pressure by modulating the bypass damper. The table highlight the type of Fire Stop required for most common applications. These installation instructions apply to ceiling radiation dampers mounted in 3 hour rated ceiling with supports from (1) a ceiling grid system, (2) ductwork above, or (3) structure above. 5 of NFPA 80(2013). Use 3-1/4 x 10 duct flat against the back wall of the cabinet, and cap it a few inches beyond the aperture to outside. The EB series dampers utilize a floating-type motorized actuator along with the Jackson Systems iO-SPC static pressure control. Use chart in the bypass sizing graphic below to check the NORMAL CFM chart to select a size damper & duct that will accommodate the zone's CFM. langdonsheetmetal. This duct pipe has a snap-lock style seam that, well, snaps together for a permanent joint. Compared to an Type-A damper, the total square inches of free area in a Type-B damper is increased and the pressure drop is reduced. As with testing dynamic fire dampers, testing a smoke damper should be done under normal airflow conditions to confirm no impediment to operation exists due to rust or damaged blades. The following information may vary among different manufacturers and should not serve as a general guide of damper installation. Lets say you have a room, like a spare bedroom, that you do not use that often. Do not use less than 6 inch diameter duct. This wall vent features a spring loaded damper which helps provide you with a tighter closing. The third type, shown here, is a recessed fan that fits into the duct and is flush with the floor. Once a building’s HVAC system is installed, it can be hard to control or limit the flow of air throughout the spaces. Dampers are placed on correct workset that is activated, visibility graphics have it on. Galvanized Steel Casing, Aluminum Blades and EPDM Rubber Seals. Install dampers using instructions provided with dampers. 3¼" x 10" RECTANGULAR DUCT WALL CAP INSTALLATION INSTRUCTIONS 3¼" x 10" RECTANGULAR DUCT WALL CAP INSTALLATION INSTRUCTIONS Plan installation carefully. Learn how to remove and replace a range hood; watch a video of helpful step-by-step removal and installation tips. All dampers have a housing made of 4 aluminium profiles and a closure consisting of aluminium. Revitalizaire Heavy-Duty Spring-Loaded Backdraft Damper. trox prd - Free download as PDF File (. Each metal lever is located on the side of the duct. ) depending on the form of control/regulation. Install through the register or plenum into an existing rectangular section of sheet metal. By installing ducts that are air tight, it will be more economical and environmentally friendly, making it easier to meet these standards. Imperial Group is an award-winning manufacturer of more than 7,000 heating, air conditioning, ventilation and building products for residential and light commercial applications. Ideal for use in sheet metal or fiberglass ducts. Do not lift damper using blade. The damper inside either allows or prohibits air from entering the bypass duct, depending on the situation. Typically, local reheat at the dual duct terminal. 99) thick coated steel may be attached to the duct with. Sheet Metal Connectors, Inc. installation costs. Note dampers orientational labelling. DIMsilencer. They are easy in installation and seat tightly. Rectangular Duct Damper Langdon, Inc. Rectangular, Four-Blade, Insulated; Std. If installing a damper which works on. 6 inch duct would normally be sufficient for a 12 x 15 room, but due to the long duct length install a duct booster fan or use 8 inch duct without a booster fan. Additional ZDS15 dampers may be ordered without the logic board and controlled by the primary damper logic board. 17 A - What size rectangular dampers do you sell? We can make virtually any size damper. This motorized damper features spring open 2 wire design for easy installation. This duct pipe has a snap-lock style seam that, well, snaps together for a permanent joint. Do not insulate the zone damper actuator. Galvanized Steel Casing, Aluminum Blades and EPDM Rubber Seals. Ductwork and supports shall conform to the HVAC Duct Construction Standards, Metal, and Flexible, Second Edition, 1995. dampers for ductwork bypass air damper rectangular duct got zones you might need a or not heating. Step 5 – Install Damper. They also enable quick access to smoke, fire and volume control dampers or other equipment mounted inside square and rectangular ductwork. we have a best quality of duct damper we have both option manual damper or motorized damper our damper made by G. Zone dampers must be able to handle the higher airflow and static pressure of a larger HVAC system. I am having a problem with the rectangular duct dampers disappearing in section view. Besides the damper test required by NFPA 105, NFPA 72 requires an annual test of the spot-type smoke detector or duct detector that activates the smoke damper. The size of ductwork affects the amount of airflow and its velocity and is very important in how well the HVAC system operates. Concealed Damper Regulators YOUNG REGULATOR COMPANY The Young 301 3/8" concealed locking regulator is designed to control dampers from the ceiling line. They show up fine in plan. OAs a special request, attenuators may be divided into. 12" x 8" Rectangular Duct Volume Damper. 2-Slip the flanges on the damper frame and secure the flanges to the duct using the 6 x 3/8'' sheet metal screws provided. Install dampers at the registers to adjust airflow. Lift or handle dampers using the sleeve or frame. Example EF-8 connects to 8" round duct. Repair your Range Vent Hood Duct & Venting for less. Customer Service: 920-787-3331. • Possibility of use as an EIS 60 damper with additional duct insulation (as indicated in national building code). This motorized damper features spring open 2 wire design for easy installation. We're doing a home addition to gain a laundry room in Orlando.