Polyester Fiber Clouds - PET Fiber Clouds

Quick summary: Polyester Fiber Clouds are suspended, PET fiber acoustic ceiling panels that hang below the ceiling to absorb mid and high frequency echo in offices, auditoriums, restaurants, and open-plan commercial spaces. They are made from thermally bonded, GRS-certified recycled PET fiber, install without a full ceiling grid, and come in NRC ratings of 0.85 to 1.0 depending on thickness. This page is written for architects, acoustic consultants, interior designers, facility managers, and procurement teams in India who are specifying acoustic ceiling clouds for a live project.
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What Are Polyester Fiber Clouds?

Polyester Fiber Clouds are lightweight, suspended acoustic ceiling panels made from compressed PET (polyethylene terephthalate) fiber, hung individually or in clusters below a ceiling using cables or rods to absorb sound and reduce reverberation time in a room.

Key takeaway:

  • They reduce echo by absorbing sound, not blocking it (that is a separate job called soundproofing).
  • They are sold as polyester fiber acoustic ceiling panels, ceiling clouds, or hanging acoustic clouds, the terms are used interchangeably in the Indian market.
  • They suit offices, auditoriums, classrooms, restaurants, and any space with a hard, reflective ceiling.
  • Installation does not require a false ceiling grid, which is why facility teams retrofit them into existing buildings.
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Features :-

Our Acoustical Polyester Fiber Clouds Have

0.80 NRC/NRC Value
  • Class “A” Fire Rated
  • Lightweight / Easy to Hang
  • Options of Various Colors
  • Options of radius, mitered, and beveled edges

How Do Acoustic Ceiling Clouds Reduce Reverberation?

Question
Answer
How does reverberation get controlled?

Porous PET fiber absorbs sound energy on impact, cutting echo and reverberation time in the room.

Reverberation time (RT60) is the industry-standard measure acoustic consultants use, and it is defined and tested per international standards such as ASTM C423, the reverberation room method used to calculate the Noise Reduction Coefficient (NRC) of a material.

Technical Information Of Polyester Fiber Clouds

Technical Data Sheet (TDS)

Property
Specification
Product type
Suspended PET fiber acoustic ceiling clouds
Composition
100% recycled and virgin polyester fiber blend
Density
200 to 400 GSM range, varies by thickness
NRC (ASTM C423 basis)
0.85 (thin) to 1.0 (thick, edge-mounted)
Fire performance
Class B1, low smoke, low toxicity
VOC / off-gassing
Formaldehyde-free, non-allergenic
Standard panel sizes
Custom cut, common range 300mm to 1200mm
Fixing method
Cable suspension, hook and rod, or ceiling clip
Colour options
Solid shades incl. light apricot acoustic panel, custom on request.

Why Thickness Matters More Than Colour for Performance

A common site mistake is choosing a colour first and thickness last. Low frequencies (below 250 Hz, think HVAC hum and traffic rumble) need panel thickness and air gap behind the cloud to absorb effectively, while thinner panels handle speech-range mid and high frequencies well. On projects where bass buildup is a complaint (gyms, cafeterias with hard floors), specifying a 50mm cloud with a larger air gap from the slab outperforms a thinner panel even in the same colour and shape.

FAQs| Acoustic Polyester Fiber Clouds

Are polyester fiber acoustic panels safe for kids' schools?

Yes, they are formaldehyde-free, non-toxic, and non-allergenic, safe for classrooms and daycare ceilings.

Do acoustic ceiling clouds actually reduce echo or just look decorative?

They genuinely absorb sound; decorative shapes and colours are a secondary design benefit.

Can I install ceiling clouds without a false ceiling grid?

Yes, they suspend directly from the structural slab using cables, hooks, or rods.

What NRC rating do I need for an open office?

Aim for NRC 0.85 or higher, covering 25 to 40% of the ceiling area.

How is a ceiling cloud different from a ceiling panel or baffle?

Clouds hang flat and low, baffles hang vertically; both absorb sound differently by orientation.

Do PET fiber panels catch fire easily?

No, they carry a Class B1 fire rating with low smoke and toxicity.

Can these panels be custom coloured, like light apricot?

Yes, most manufacturers offer 40+ shades including light apricot and custom RAL matching.

Will ceiling clouds stop noise from the floor above?

No, they absorb echo within a room; they do not block transmission between floors.

How long does installation typically take for an office ceiling?

A mid-sized office is usually completed in two to four working days.

Are these panels washable or do they collect dust over time?

They are low-maintenance and vacuum-cleanable; heavy washing is not generally recommended.

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