As a company PŘÍHODA s.r.o. places tremendous importance on the quality of the materials used. In every case we use specially developed materials that have been subjected to extensive development testing in order to achieve maximum performance benefits for our customers. The PMI/NMI fabrics provide all the benefits listed below as part of our standard design (at no additional cost).

Here you can download material certificates

List of most important benefits of our fabrics

High rigidity and strength

Our basic PMS/PMSre/NMS/PMI//NMI fabrics demonstrate optimum rigidity of 1800 N/10mm in the texture and 1000 N/10mm in the weave. These parameters make tearing of the material in normal use almost impossible.

High fire resistence

The PMI/NMI/PMS/NMS/PLS/NLS/NMR/PMSre fabrics are certified to European standard EN 13501-1 with excellent results. In this test our fabrics achieve B-s1,d0 classification, which means prevention of spread of fire, minimum smoke production and no burning drops. NHE fabrics in fact meet class A requirements. PMI/NMI/PMS/PMSre fabrics are also certified to US norm UL 723.

Negligible fibre shedding

Due to the use of endless fibres, most of our fabrics can be used in cleanrooms. Independent laboratory tests demonstratethat there is practically no particle shedding from our material during operation.

Antistatic effect

Woven carbon fibre in PMI/NMI materials removes any build up of electric charge from the surface of the fabric.

Antibacterial effect

We utilise a special treatment which guarantees that no bacteria can survive if settled on to our fabric PMI/NMI/NMR. This treatment remains effective after multiple washing. Tests for the European standards found that after TEN washes there was no reduction in the efficacy of the treatment.  This allows us to offer a 10 year warranty on the basis of our minimal maintenance requirements (see the following point).

Easy to maintain

Our fabrics which are manufactured using endless fibres are very effective and mimimalize settlement of impurities from the supply air. This supply air is distributed through the diffuser perforations, and the Fabric Ducts remain relatively clean inside (in a normal environment). They do not require any other maintenance than outer dusting. Washing is normally only required for either hygiene or aesthetic reasons.

Stable Appearance

Thanks to our endless fibre technology, the appearance of the fabric does not change over time, or with multiple washing cycles, unlike materials made of basic fibres. Our PMI//NMI/PMS/PMSre/NMS materials remain aesthetic after many maintenance cycles.




How to Choose a Suitable Fabric?

1/ What level of fire resistance do you need?

Our fabrics have 3 levels of fire resistance.

Peak fire resistance: This fabric (NHE) is in class A2-s1,d0 as per EN 13501-1. Within this class, we only use fabrics constructed from fibreglass with a polyurethane coating. These are however non permeable and more fragile than polyester fabrics of medium weight.

Increased fire resistance: These materials (PMI/NMI/PMS/ PMSre/NMS/PLS/NLS/NMR) comply with requirements for use in a vast majority of rooms and are in class B-s1,d0 as per EN 13501-1. It means practically non combustible and very low smoke production. These materials meet the requirements for use in majority of spaces.

Low fire resistance: These fabrics are in classes B-s2,dO (NMF), C (NMT), E (NLW), F (NLF) as per EN 13501-1. They can be used in rooms where an increased fire resistance is not required.

2/  What are your demands for rigidity and cleaning ability?

Fabrics are divided in 3 categories by weight.

Light (L): Diffusers made from these materials (PLS, NLS, NLF, NLW) only require 20 Pa of static pressure to achieve good inflation. However, they are light weight and have lower rigidity and increased risk of tearing if used out of specification. All our lightweight materials can be machine washed with the exception of NLF.

Medium (M): These fabrics (PMI, NMI, PMS, NMS,   PMSre, NMF, NMT, NMR) have a mass between 180 and 350 g/m2. They display the highest rigidity and anti-tear resistance. The minimum static pressure required for good inflation is 40 Pa. All of our medium weight materials can be machine washed.

Heavy (H): It is the fabric (NHE) coated by polyurethane and that’s why it can be impermeable only. It must not be washed in washing machine but can be dry or water cleaned manually. A minimal static pressure for inflation is 50 Pa.

3/ Do you need a permeable fabric?

Permeable material prevents condensation occuring on the duct when cooling below dew point.

4/ Do you want a totally sustainable product? We can offer recycled material.

All of our products are environmentally friendly for many reasons. Furthermore we can offer 100% recycled material PMIre. We work with a global textile manufacturer, Unifi, to supply REPREVE recycled fiber that is made from post-consumer plastic bottles. Thanks to recycled fibres is our product totally sustainable. This product also looks and performs identically to our original Prihoda PMI. PMIre is flame retardant,  antibacterial and cleanroom quality material and we have it in four stock colours WH, LG, DG and BL. Just 1 m2 of prihoda recycled fabric saves 13 bottles from landfill.

5/ What colour do you want?

Most of our materials are available from stock in the range of 9 colours detailed below (shades may vary). None standard (special) colours are available, but require longer delivery timescales.



Shadecard PMS, PMI, NMS, NMI


Shadecard PLS, NLS


Shadecard PMSre


Shadecard NHE


Shadecard NLF


Shadecard NMR


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