Physical properties
Density, thickness, fire classification, colours and care.
Density & thickness
Acoustic felt is a non-woven material made from polyester (PET) fibres that are thermally bonded together. Its density and thickness determine how much sound it absorbs and at which frequencies, as well as how rigid the finished shape is. Exact values for each product are on its datasheet.
| Material | Polyester (PET) felt, thermally bonded |
|---|---|
| Typical thickness | 9–12 mm per layer (provisional) |
| Values per product | On each product datasheet |
Fire classification (EN 13501-1)
Across Europe, the fire performance of building materials is classified under EN 13501-1. The classification covers how the material reacts to fire, how much smoke it produces (s1–s3) and whether it drips burning droplets (d0–d2). A classification applies to the product as tested, including its mounting: some felt products are classified only when installed with an air gap behind them, and some ratings cover the felt rather than the complete luminaire. Where the manufacturer publishes a classification, the product page states it as published, and we supply the classification report on request so building control and fire engineers can check it.
| Standard | EN 13501-1 |
|---|---|
| Classification | As published per product (for example B-s1,d0), including any mounting conditions |
Colour & light-fastness
Felt is solution-dyed or dyed through the fibre, so colour runs all the way through the material and small scuffs don't show a different colour underneath. Light-fastness ratings, which measure how well colour resists fading in daylight, are on each product's datasheet.
Cleaning & care
Felt luminaires need very little maintenance. Dust them regularly with a soft brush or a vacuum on a low setting with a brush attachment. Never clean the LED module with liquids; isolate the luminaire electrically before any maintenance.
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