Rectangular Attenuators

Products

Attenuators By Types

Straight

RS - Rectangular Attenuators with Straight Splitters

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.

Model	Width Increment	Free Area Ratio	Length	dB(A) Reduction
RS07B	275	27%	900	20
RS07C	275	27%	1200	23
RS07D	275	27%	1500	25
RS07E	275	27%	1800	26
RS07F	275	27%	2100	28
RS07G	275	27%	2400	30
RS10B	300	33%	900	18
RS10C	300	33%	1200	21
RS10D	300	33%	1500	23
RS10E	300	33%	1800	24
RS10F	300	33%	2100	26
RS10G	300	33%	2400	27
RS12B	325	38%	900	17
RS12C	325	38%	1200	19
RS12D	325	38%	1500	21
RS12E	325	38%	1800	22
RS12F	325	38%	2100	23
RS12G	325	38%	2400	25
RS15B	350	43%	900	16
RS15C	350	43%	1200	18
RS15D	350	43%	1500	19
RS15E	350	43%	1800	21
RS15F	350	43%	2100	22
RS15G	350	43%	2400	24

NSA - Rectangular Attenuators with Straight Splitters

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)

Model	Width Increment	Free Area Ratio	Length	dB(A) Reduction
NSA05A	250	20%	600	21
NSA05B	250	20%	900	24
NSA05C	250	20%	1200	27
NSA05C2	250	20%	1400	28
NSA05D	250	20%	1500	28
NSA05E	250	20%	1800	31
NSA05F	250	20%	2100	33
NSA05G	250	20%	2400	35
NSA05H	250	20%	2700	37
NSA05I	250	20%	3000	39
NSA05J	250	20%	3300	40
NSA05K	250	20%	3600	42
NSA07A	275	27%	600	19
NSA07B	275	27%	900	22
NSA07C	275	27%	1200	24
NSA07C2	275	27%	1400	25
NSA07D	275	27%	1500	26
NSA07E	275	27%	1800	27
NSA07F	275	27%	2100	30
NSA07G	275	27%	2400	31
NSA07H	275	27%	2700	33
NSA07I	275	27%	3000	35
NSA07J	275	27%	3300	36
NSA07K	275	27%	3600	37
NSA10A	300	33%	600	18
NSA10B	300	33%	900	21
NSA10C	300	33%	1200	23
NSA10C2	300	33%	1400	24
NSA10D	300	33%	1500	25
NSA10E	300	33%	1800	26
NSA10F	300	33%	2100	27
NSA10G	300	33%	2400	29
NSA10H	300	33%	2700	30
NSA10I	300	33%	3000	31
NSA10J	300	33%	3300	33
NSA10K	300	33%	3600	34
NSA12A	325	38%	600	17
NSA12B	325	38%	900	19
NSA12C	325	38%	1200	22
NSA12C2	325	38%	1400	23
NSA12D	325	38%	1500	24
NSA12E	325	38%	1800	24
NSA12F	325	38%	2100	26
NSA12G	325	38%	2400	27
NSA12H	325	38%	2700	28
NSA12I	325	38%	3000	30
NSA12J	325	38%	3300	31
NSA12K	325	38%	3600	32
NSA15A	350	43%	600	16
NSA15B	350	43%	900	18
NSA15C	350	43%	1200	20
NSA15C2	350	43%	1400	21
NSA15D	350	43%	1500	21
NSA15E	350	43%	1800	23
NSA15F	350	43%	2100	24
NSA15G	350	43%	2400	26
NSA15H	350	43%	2700	27
NSA15I	350	43%	3000	28
NSA15J	350	43%	3300	28
NSA15K	350	43%	3600	29
NSA17A	375	47%	600	15
NSA17B	375	47%	900	18
NSA17C	375	47%	1200	19
NSA17C2	375	47%	1400	21
NSA17D	375	47%	1500	21
NSA17E	375	47%	1800	22
NSA17F	375	47%	2100	23
NSA17G	375	47%	2400	25
NSA17H	375	47%	2700	26
NSA17I	375	47%	3000	27
NSA17J	375	47%	3300	27
NSA17K	375	47%	3600	28
NSA20A	400	50%	600	14
NSA20B	400	50%	900	17
NSA20C	400	50%	1200	18
NSA20C2	400	50%	1400	19
NSA20D	400	50%	1500	20
NSA20E	400	50%	1800	21
NSA20F	400	50%	2100	22
NSA20G	400	50%	2400	23
NSA20H	400	50%	2700	25
NSA20I	400	50%	3000	27
NSA20J	400	50%	3300	27
NSA20K	400	50%	3600	29
NSA22A	425	53%	600	13
NSA22B	425	53%	900	16
NSA22C	425	53%	1200	18
NSA22C2	425	53%	1400	19
NSA22D	425	53%	1500	19
NSA22E	425	53%	1800	20
NSA22F	425	53%	2100	21
NSA22G	425	53%	2400	22
NSA22H	425	53%	2700	23
NSA22I	425	53%	3000	24
NSA22J	425	53%	3300	25
NSA22K	425	53%	3600	26
NSA25A	450	56%	600	13
NSA25B	450	56%	900	15
NSA25C	450	56%	1200	17
NSA25C2	450	56%	1400	18
NSA25D	450	56%	1500	18
NSA25E	450	56%	1800	19
NSA25F	450	56%	2100	20
NSA25G	450	56%	2400	21
NSA25H	450	56%	2700	22
NSA25I	450	56%	3000	23
NSA25J	450	56%	3300	23
NSA25K	450	56%	3600	25