Product & Services

Browse

Selecting fabric and flow model, steps 2-3, Sound

Open in viewer

One of the most important
issues when it comes to the
indoor environment is sound.
Sound comes from the outdoor
environment, internal process-
es, machinery and the building’s
technical installations, including
the HVAC system.

Fundamentally FabricAir® technology is
looked upon as "noise free" which makes
the different fabrics and flow models
suitable in most applications. Compared to
other technologies –especially sheet metal
– fabric does not tend to transmit and carry

noise through the duct system (some noise is unavoidable, however, due to various flow models and rising design pressure). NC-20 and below are specially-optimized LowNoise™ solutions. In such cases please contact
FabricAir®

STEP 1 A table of admissible noise levels is found here.

This table shows the Noise
Criteria (NC level) depending
on FabricAir® flow model,
FabricAir® fabric and
design pressure.

15	= LowNoise™, call
20	= LowNoise™, call

STEP 2 Find NC levels at your Design
Pressure

NC level

STEP 3 Mark suitable fabric and flow
models for the corresponding
NC level and go to step 4
(through 8) here.

0.24	0.32	0.40	0.48	0.56	0.64	0.72	0.80	Fabric	Flow Model:

15	15	15	20	20	25	25	25	FabricAir® Trevira CS	FabFlow™
15	15	15	20	20	25	25	25	FabricAir® Combi 20/60/70/80

25	30	30	30	35	35	40	40	FabricAir® Combi 85/90	PerfoFlow™
20	25	25	30	30	35	35	35	FabricAir® Glass

20	25	25	30	30	35	35	40	FabricAir® Trevira CS	MeshFlow™
20	25	25	30	30	35	35	40	FabricAir® Combi 20/60/70/80
25	25	30	30	35	35	40	40	FabricAir® Antistat
25	30	35	35	40	40	45	45	FabricAir® Combi 85/90

25	30	30	30	35	35	40	40	FabricAir® Combi 85/90	SonicFlow™

20	25	25	25	30	30	35	35	FabricAir® Combi 85/90	OriFlow™
20	25	25	30	30	35	35	35	FabricAir® Glass
20	25	25	30	30	35	35	35	FabricAir® Poly

20	20	25	25	30	30	35	35	FabricAir® Trevira CS	NozzFlow™
20	20	25	25	30	30	35	35	FabricAir® Combi 20/60/70/80
20	25	25	30	30	35	35	35	FabricAir® Antistat
20	25	25	30	30	30	35	35	FabricAir® Combi 85/90
JetFlow: Go to page								---	JetFlow™

The NC level will depend on material, specific
orifice size and design pressure.
LowNoise™ LowNoise™ Criterion below NC-20 please contact
FabricAir® for special LowNoise™ solution.