With acoustic infill material made from specially developed postindustrial organic fibre, iacs range of green duct attenuators offers a solution to the everincreasing requirements for ecofriendly hvac silencer systems. Ac infinity flexible 8inch aluminum ducting, heavyduty fourlayer protection, 25feet long for heating cooling ventilation and exhaust. Pottorff model ra silencer is designed for return air transfer openings or return air grilles between adjacent spaces. Select silencers based on specified noise criteria. Prosilencer new program for sound attenuator selection swegon. We also undertake sound attenuator selection and supply for generator fan rooms, and successfully installed in various university, commercial and hospitality projects. The sound attenuators should have adequate silencing capabilities, low air resistance and be as small as possible. We do this by offering you, at no cost, access to our oneofakind online silencer database, selection and duct analysis program. Two silencers can be used together in installations where noise reduction is critical. Prosilencer new program for sound attenuator selection. Sound attenuators are a proven and effective method for reducing the noise generated by fans and other equipment. Sound attenuators noise reduction for hvac duct systems. Airvent silencers are designed for low volume, low velocity situations where spot attenuation is necessary.
Duct system design guide first edition 2003 mcgill airflow corporation mcgill airflow corporation one mission park groveport, ohio 43125. The user would like to have a target noise level in the carpark of 60dba. Use fansil and comsil acoustic analysis and selection software powerful desktop tools. An acoustic noise calculation of a ventilation system can follow the procedure indicated in the example below.
How to select a rectangular attenuator for this scenario, noise from a car park exhaust fan results in a noise level of 83dba in the car park it ventilates. Free attenuator selection software alnorsilent is a free selection software for silencers circular and rectangular available for download on our website. Dimsilencer provides quick, professional sound calculation as well as simple product selection combined with a high degree of userfriendliness. The 4 depth allows plenty of options for the installation of this silencer. For either option, the performance specification can be selected for the chosen unit size using the rectangular silencer selection procedure. This choice in duct mufflers is to accommodate shape, pressure drop vs. Covers the ncs, nsm, nct, ntm ranges, lengths from 600mm to 3600mm. The internal configuration of this model silencer is designed so that the silencer exit matches the fan inlet box thereby eliminating the need for a separate transition. Silencer selection software aleja krakowska 10, 05552 wola. We provide you with the design and engineering assistance to integrate our silencer designs into a total system solution. Duct calculator is a powerful tool that provides access to duct calculation and sizing capabilities either. You can select silencer for chosen fan, determine sound level, compare parameters and much more. Free silencer selection software alnosilent available for download.
Industrial air duct silencers for hvac noise enoise control. Hush duct sourceairborne industrial pathdirect hvac. Sound attenuator selection software and acoustical duct system. A graphical representation of the input and output sound values is provided. Duct system design guide first edition 2003 mcgill airflow corporation mcgill airflow corporation one mission park groveport, ohio 43125 duct system design i.
Hush duct sourceairborne industrial pathdirect hvac oem. Selection by performance selection by the required performance of the product selection by criteria selection based on the target noise criteria nc, room. Sound attenuator selection software and acoustical duct system analysis kinetics noise control, inc. Iacs green duct attenuator range is the first british made green silencer range for air handling applications. Duct size and maximum length available for silencer to fit in. Nest the inner silencer component inside of the outer elbow silencer component. Manufactured to join on to rectangular ductwork, ruskin sound control rectangular silencers come in a variety of configurations.
Also referred to as duct silencers, sound traps or mufflers, they are designed to reduce the noise transmitted from a source to the receiver. Buy duct silencers at wholesale prices with fast shipping. Please note that a field is provided for a user input sound attenuation value, such as a silencer on the induced air inlet. Internal and external areas, weights, number of internal and external stiffeners are provided as.
Employ vaw systems industry proven selection software for a quick, economical. If a duct dimension is an odd number, round up to the next even number. If required, select inlet filter boxes, rain hoods, duct fittings and flexjoints. National websites direct contact for lindab products and system in your country local languages. Ncs acoustics have developed an attenuator selection program, software that helps you to identify the right attenuators for you needs. Hvac analysis for silencer selection this design manual provides enough information to perform analysis of airborne noise in ducted hvac systems where. Duct silencer modeltype to concurrently meet the noise reduction, pressure loss and selfgenerated noise requirements. Whereas the direct sound attenuator selection section has been updated and improved and the program now has the same layout as proselect, which facilitates handling as the different menus and functions are familiar. Software for the selection and design of rectangular and circular silencers.
Internal and external areas, weights, number of internal and external stiffeners are provided as well as quantity of infill and perforated metal sheets. Reverse flow occurs when air and sound waves travel in opposite directions, as in a typical return. Rectangular silencers are intended for silencing noise in rectangular ductwork and a wide range of design options allow them to be integrated into any hvac system with ease. Fast and user friendly, you can make a quick selection or move to more advanced system calculations. Circular duct silencer for ventilation systems buy duct.
Lowvelocity design will lead to larger duct sizes, but it may be worth since, doubling of duct diameter. Il data for airflow velocities available on request. Vivosun 6 inch noise reducer silencer for inline duct fan. Dimsilencer, professional sound calculating lindab. Rectangular silencers noise control price industries. Our team is experienced in evaluating factors such as air volume and velocity, and will engineer duct silencer solutions to achieve all of the performance specifications on your project. Model ra silencers are fabricated with a 4 102 thickness for installation in wall cavities or other applications where noise control is required in a low profile. Most advanced hvac acoustic algorithms in the noise control market. Our team is experienced in evaluating factors such as air volume and velocity, and will engineer duct silencer solutions to achieve all of.
We provide you with the design and engineering assistance to integrate our silencer designs into a. M is always perpendicular to the plane of the baffle. In ventilation systems, noise stems from a variety of components such as the fans or the fire dampers. Use comsil acoustic analysis and selection software a powerful desktop tool. Clamp from the inside corner of the inner component to the outside corner of the outer component. Lay silencer component with duct extensions connected flat on the ground. Select from a wide range of rectangular, elbow and circular silencers. Whereas the direct sound attenuator selection section has been updated and improved and the. Silencer inlet and outlet connections are matched to the actual duct dimensions in order to avoid the need for transitions in the field. Internal and external areas, weights, number of internal and external stiffeners are. Ruskin sound control can also manufacture the rectangular silencers in any length between 36 and 120. Duct silencer length, open area, and configuration are all determined by the noise control requirements and the design of the duct system. You can make ads in the engineering toolbox more useful to you.
Fan noise generation by octave band from fan manufacturer. Price silencer selection software is fully integrated into the latest edition of the allinone software platform, and features. Splitters and splitter attenuators from trox are certified for use in room air conditioning. When attached to an inline or remote fan, the ld silencer dramatically reduces the sound traveling through the duct. Direct contact for lindab products and system in your country local languages. Duct designer streamlines duct design and improves calculation precision, letting you optimize your designs. Details of the airhandling units with its noise levels. Design rectangular and circular silencers for air movement applications. If a duct silencer is provided between the source and the room, input the values here, being sure that any self generated sound created by input air velocities has been accounted for. To comply with a specified noise level, sound attenuators are added to suitable locations in the ventilation system. Primary applications nonducted return plenums, hotel restroom exhaust, retrofit applications, general ventilation. Hush duct ventilation silencers product data section general information technical information. The exhaust air volume passing through the fan is 7m3s. Silentmod hvac are fabricated from 2218 gauge galvanized steel for superior strength and maximum sound transmission reduction through side walls.
Under forward flow conditions, high frequency sound is refracted into the duct silencer walls. Fantech ld silencers are typically used for kitchen exhaust systems. Sound attenuator selection software and acoustical duct system analysis register. Enter the manufacturers sound power data or calculate the fan sound power. Duct silencer development forward flow occurs when air and sound waves travel in the same direction, as in an air conditioning system or fan discharge. Our kselect selection software incorporates powerful engineering tools to provide a design reference that can save significant time in the design of a buildings hvac system. No flimsy 26 or 24 gauge vent noise silencer material that vibrates in the airstream. Attenuator selection procedure low ffreq bias nnoise db overall level attenuator loss ddb after attenuator db overall level 63hz 75 76. How much silencer airflow generated noise gn can be tolerated.
Highvelocity hv duct systems are characterized by air velocities in the range of 2500 to 3500 fpm. Easy to use sourcepathreceiver hvac acoustical analysis 516 nw 20th oklahoma city, ok 73103. Noise control products rectangular silencers by tailoring construction elements including the unit width, pressure class, fill materials and internal baffle geometries, pottorff provides a robust product offering backed by data from our nvlap lab code 2010060 accredited acoustic testing laboratory. Lowvelocity ductwork design is very important for energy efficiency in air distribution systems. With the introduction of vdi 6022, specific hygiene requirements for room air conditioning systems were required for the first time. The product provides an amazing amount of attenuation in such a compact and economical package. Ductsize lets you create a complete duct system from start to finish, and gives you control over every aspect of the design.
Work with compressors, condensing units and controls ease of use multi language capability. Effective noise control works to reduce noise through engineering. Putting it another way, a straight duct section would provide an almost zero pressure drop but also zero attenuation. Fansil software for industrial fan silencer analysis and product selections. Acousticcalc noisecalc is an easy, fast and accurate computer software program for predicting hvac noise and sound levels. For hvac applications, they are commonly installed on intake and discharge sides of a fan. Additional program to calculate duct silencer selection edison teachers and students can use multimedia screens, virtual instruments, sound, and animation to create, test, and safely repair circuits. Airmaster is one of the leading sound attenuators manufacturers in the region using a third party renowned selection software for a reliable sound attenuator selection process. It is recommended to install the silencer after the volume control damper to prevent regenerated noise. Maximum insertion loss l balanced performance m ultralow pressure drop h construction type. To select the appropriate silencer and optimize connection size and length for the best performance you can use our online tool lindqst or our free to download software dimsilencer. The industrys leading selection software gives you access to the functionality you want with a single click. Sheets and our selection software for a complete set of product ratings. Ideal for fan inlet and exhaust silencers and duct silencers.
Purchased to reduce noise of my vivosun 390 cfm inline duct fan in my vivosun 48 x 48 x 80 grow tent as always a great quality product from vivosun, highly recommend there products. Typical silencer model designation 12vsr2l x m x n 305vrs2 l x m n 12 305 uunite size in mm vrs2 silencer type l x length in mm m x n cross section in mm silencers with m and n under 48 in. Hush duct ventilation silencers product data section. Quietduct silencers sound attenuators are used to reduce airborne noise through commercial hvac ductwork systems, building openings, sound enclosures. This will ensure the silencer is nested as much as possible see figure 1. Products and material options are adaptable to virtually any commercial hvac system. If a duct silencer is provided between the source and the room, input the values here. With literally decades of combined noise control experience.
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