Products   Attenuators By Types   Rectangular Attenuators
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NSA - Rectangular Attenuators with Straight Splitters
ntp
Features

The NSA rectangular attenuators are available in a wide range of dimensions. They have straight splitters which provide a higher noise reduction in comparison to tapered splitter variants, but have a higher static pressure loss across the attenuator.

NSA AirLay models use a revolutionary polyester acoustic infill which is made from 70% recycled plastics. It provides greater insertions losses across the most critical frequencies when compared to conventional infill materials. Airlay is suitable for dry general HVAC applications with temperatures up to 80°C.

The NSA rectangular attenuators use cases and splitter frames made from durable galvanized sheet steel as standard.

Refer to the Q-Seal series for applications where moisture may be present in the air stream.

The RS (standard model) rectangular attenuators are also available in a wide range of dimensions (see below)



ModelWidth
Increment
Free Area
Ratio
LengthdB(A)
Reduction
NSA05A250 20% 60021
NSA05B250 20% 90024
NSA05C250 20% 120027
NSA05C2250 20% 140028
NSA05D250 20% 150028
NSA05E250 20% 180031
NSA05F250 20% 210033
NSA05G250 20% 240035
NSA05H250 20% 270037
NSA05I250 20% 300039
NSA05J250 20% 330040
NSA05K250 20% 360042
NSA07A275 27% 60019
NSA07B275 27% 90022
NSA07C275 27% 120024
NSA07C2275 27% 140025
NSA07D275 27% 150026
NSA07E275 27% 180027
NSA07F275 27% 210030
NSA07G275 27% 240031
NSA07H275 27% 270033
NSA07I275 27% 300035
NSA07J275 27% 330036
NSA07K275 27% 360037
NSA10A300 33% 60018
NSA10B300 33% 90021
NSA10C300 33% 120023
NSA10C2300 33% 140024
NSA10D300 33% 150025
NSA10E300 33% 180026
NSA10F300 33% 210027
NSA10G300 33% 240029
NSA10H300 33% 270030
NSA10I300 33% 300031
NSA10J300 33% 330033
NSA10K300 33% 360034
NSA12A325 38% 60017
NSA12B325 38% 90019
NSA12C325 38% 120022
NSA12C2325 38% 140023
NSA12D325 38% 150024
NSA12E325 38% 180024
NSA12F325 38% 210026
NSA12G325 38% 240027
NSA12H325 38% 270028
NSA12I325 38% 300030
NSA12J325 38% 330031
NSA12K325 38% 360032
NSA15A350 43% 60016
NSA15B350 43% 90018
NSA15C350 43% 120020
NSA15C2350 43% 140021
NSA15D350 43% 150021
NSA15E350 43% 180023
NSA15F350 43% 210024
NSA15G350 43% 240026
NSA15H350 43% 270027
NSA15I350 43% 300028
NSA15J350 43% 330028
NSA15K350 43% 360029
NSA17A375 47% 60015
NSA17B375 47% 90018
NSA17C375 47% 120019
NSA17C2375 47% 140021
NSA17D375 47% 150021
NSA17E375 47% 180022
NSA17F375 47% 210023
NSA17G375 47% 240025
NSA17H375 47% 270026
NSA17I375 47% 300027
NSA17J375 47% 330027
NSA17K375 47% 360028
NSA20A400 50% 60014
NSA20B400 50% 90017
NSA20C400 50% 120018
NSA20C2400 50% 140019
NSA20D400 50% 150020
NSA20E400 50% 180021
NSA20F400 50% 210022
NSA20G400 50% 240023
NSA20H400 50% 270025
NSA20I400 50% 300027
NSA20J400 50% 330027
NSA20K400 50% 360029
NSA22A425 53% 60013
NSA22B425 53% 90016
NSA22C425 53% 120018
NSA22C2425 53% 140019
NSA22D425 53% 150019
NSA22E425 53% 180020
NSA22F425 53% 210021
NSA22G425 53% 240022
NSA22H425 53% 270023
NSA22I425 53% 300024
NSA22J425 53% 330025
NSA22K425 53% 360026
NSA25A450 56% 60013
NSA25B450 56% 90015
NSA25C450 56% 120017
NSA25C2450 56% 140018
NSA25D450 56% 150018
NSA25E450 56% 180019
NSA25F450 56% 210020
NSA25G450 56% 240021
NSA25H450 56% 270022
NSA25I450 56% 300023
NSA25J450 56% 330023
NSA25K450 56% 360025
RS - Rectangular Attenuators with Straight Splitters
rt
Features

The RS rectangular attenuators are available in a wide range of dimensions. They have straight splitters which provide a higher noise reduction in comparison to tapered splitter variants, but have a higher static pressure loss across the attenuator.

RS models use a bio-soluble acoustic grade glass wool or mineral wool infill, faced with fiberglass membrane, encased in finely perforated galvanised steel. Infill is hygroscopic and incombustible. It is suitable for dry general HVAC and industrial applications.

The RS attenuators use cases and splitter frames made from durable galvanized sheet steel as standard.

Refer to the Q-Seal series for applications where moisture may be present in the air stream.



ModelWidth
Increment
Free Area
Ratio
LengthdB(A)
Reduction
RS07B275 27% 90020
RS07C275 27% 120023
RS07D275 27% 150025
RS07E275 27% 180026
RS07F275 27% 210028
RS07G275 27% 240030
RS10B300 33% 90018
RS10C300 33% 120021
RS10D300 33% 150023
RS10E300 33% 180024
RS10F300 33% 210026
RS10G300 33% 240027
RS12B325 38% 90017
RS12C325 38% 120019
RS12D325 38% 150021
RS12E325 38% 180022
RS12F325 38% 210023
RS12G325 38% 240025
RS15B350 43% 90016
RS15C350 43% 120018
RS15D350 43% 150019
RS15E350 43% 180021
RS15F350 43% 210022
RS15G350 43% 240024
Elta Group