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Why Are Cloth Air Ducts Disappearing and Being Replaced by Sox Air Ducts?
The Cloth Air Duct
Durkeesox Redefines the New Standard of Air Duct in Public Places
Ten Permeability
Nanosox HVAC duct adopts Unique micro-permeability technology - Small Permeability as 3.6 m3/m2/h (0.2 cfm/ft2) is available to strike a proper balance between anti-condensation and energy-saving, only a small percentage of airflow is permeated from fabric surface for anti-condensation, most air is discharged from precisely calculated orifice towards the targeted area in a very fast pace, which reduces energy wasting at high space.
| Property | Items | Application | Requirement | Index | Code compliance | Remarks | |
| Material property | Permeation | Error rate of permeation index <5% (under 125pa or at 0.5w.g) | Ventilation area: e.g. gym ventilation | Non-permeable Omm/s | GB/T5453-1997 | National textile products quality supervision and inspection center | To make sure the air dispersion performance, the permeability should be selected carefully according to the installation height, air volume, air pressure and condensation free and energy saving |
| High and large space/space with fast end air velocity | Micro-permeability 1,2,5mm/s | ||||||
| Middle or low space/space with slow end air velocity | Medium-permeability 10,20,30mm/s | ||||||
| Low space/slow end air velocity | Large-permeability 40,80,100mm/s | ||||||
| Fire safety | B | Above the ground | Wash durability 50 times B-s1,d0, t0 Smoke Toxicity ZA Class1 | GB 8624-2012 GB20286-2006 EN13501-1:2007 | National fireproof construction material quality supervision and inspection center | Product quality tracking; Certification of fire retardant identity in public places Wash durability 50 times | |
| A2 | High-rise/basement/strict fire safety space | A2-s1,d0,t0 | GB 8624-2012 | National fireproof construction material quality supervision and inspection center | Formal testing | ||
| Other physical properties | Clean and fiber shedding | All application area | No particle detachment | Ac167 and UI181 | UL | Formal testing | |
| Mildew resistance | All application area | During the 60 days UL 181 test, no microbial breakage or decomposition | |||||
| Health and safety of textiles | All application area | PH4.0-7.5 Formaldehyde content<=20mg/kg no peculiar smell. | GB18401-2003 | National textile products quality supervision and inspection center | |||
| Product Property | Pressure resistance | Under the static pressure of 1900pa,no change of the sample | No change | Ac167 and UL 187 | UL | Formal test and approval |
| Property Items | Index | Resuts | Code compliance | ||
| Material Property | Fire safety | B/S1/d0/t0 Class 1&Class0 | B1(B-s2,d0,t0) | GB8624-2012 EN13501-1:2007 UL 2518 BS 476-6,7:1997 | |
| Thermal conductivity | 0C(average temperature),<=0.036 | 0.033 | GB/T 17794-2008 ASTMC 177/C518-10 | ||
| Moisture Permeability | water vapor permeability | <=1.3 X 10 -10g/(s.m.Pa) | 1.0 x 10^-10 | ASTME96-10 | |
| Moisture resistance factor | >=1.5x10^3 | 2 x 10^4 | ASTEM96-10 | ||
| Water absorption(by volume) | <=0.3% | 0.17% | ASTMC209-07 | ||
| Product performance | Pressure resistance | When the pressure reaches 2000pa, the product is normal without any breakage | No change | AC 167 & UL 181 | |
| Air leakage volume (m^3/h.m^2) | When inner static pressure is 5000pa, the leakage per unit area Qa<=3 | 0.31 1.34 | JGJ141-2004 | ||
| When inner static pressure is 1000pa, the leakage per unit area Qa<=1.57 | |||||
| Durability | Air leakage after durability test is less than 80% of the air leakage before the best | 37% | JG/T258-2009 | ||
| Anti-condensation | There is no condensation at the duct surface, flange joint, and support reinforcement | Condensation free | JG/T258-2009 | ||
