Durkeesox-Fabric Ducts-FAQ


Nanosox System >>>


What is the expected system's service life of a DurkeeSox system?

A DurkeeSox systems practical service life depends on the application environment,AC system,etc factors.Generally,Service life of NanoSox -N exceed 20 years,NanoSox -L 15 years,FiberSox 10 years.Our warranty for NanoSox -N is 15 years,NanoSox -L10 years,FiberSox 8 years


Nanosox system of Durkeesox is more expensive or cheaper than traditional GI duct? What’s the cost per square meter?

Nanosox system will adopt different fabric permeability, parts, fittings and accessories, which distinguish from to each other. So usually, we’re not able to quote per meter no matter for international or domestic market, but quote per whole system with a total price. According to our experience, in large space places, it demands less quantity of Nanosox system and will have similarly or even cheaper cost comparing to traditional ducts. However, in low space, DurkeeSox system will cost more. Additionally, Nanosox system has flexible designs that can generate different costs. And proper design can be made upon customer’s requirements.


When the DurkeeSox fabric duct washed, have any effect on its performance?

The fireproof, anti-mildew, antibiosis and anti-static abilities of the DurkeeSox fabric ducts are added into the fabric particle before spinning, not adding after fabric spinning, that’s way there are no influence after wash. Also, the abilities of fireproof, antibiosis and etc are washable and tested by national association of testing authorities. Especially the durability of fire proof ability is up to 50 times wash and tested by the national association of testing authorities.


Does a DurkeeSox system meet the fire safety regulation in different countries and regions in global market?

As an end air dispersion system in HVAC, DurkeeSox has passed all kinds of widely recognized international certificates and fire testings including UL AJIJ and AC167 certificates, testing certificate under EN13501-2002 class B1-s1,d0, and China official fire certificate under GB-8624-2006-Class B-s1,d0,t0 and Class A. DurkeeSox system meets or surpasses code regulations on fire safety in all countries and regions.


DurkeeSox system looks nice when inflated, how does it look when it's not inflated?

A DurkeeSox system is made of flexible material, it will droop when the system is off. To gain a better visual effect when the system does not run, a double row suspension system can be used to maintain the round shape on the bottom. For better result, the IRR (Internal Retention Ring) system can be used to better maintain the round shape.


It seems that a DurkeeSox system has a good performance in a cooling or refrigeration application.What about in a heating application? Can the heated air could be thrown down to the occupied zone?

A DurkeeSox system's air dispersion principle applies induction type laminar flow air dispersion, when air flow is ejected out of the duct openings at a high velocity, compared with ordinary AC system, heat exchange with ambient air in the height is rare, the airflow will not dispersed till the air flow reaches destination area, thus little difference between cold air and hot air dispersion. In a practical application, AHU if matched with cold & hot air dispersion mode could achieve a better effect.


What is the DurkeeSox air duct product cleaning and maintenance period requirement?

A DurkeeSox cleaning & maintenance period is variable and depends on the air dispersion mode, application environmental cleanliness requirement, AHU's filter grade, etc factors. Normally recommended maintenance period is every 3 months for refrigeration and food processing applications with clean requirement; for commercial, public places and large areas, etc normally a 1 to 3 year period. In a serious pollution environment, the color of fabric may become darker after washing.


How much is the friction factor of a DurkeeSox system? Does DurkeeSox have a large system resistance? Are there any additional requirements on air volume or air pressure of AHU?

DurkeeSox system friction factor is less than 0.024, similar to metal duct, but in practical applications, friction resistance of DurkeeSox system is much less than conventional ducts, due to mostly in round shape, lower average air velocity especially at the middle and end part. For simple straight duct, the system resistance is less than static pressure regain, so the friction resistance could be ignored. For complicated ductwork, the system resistance is only 1/3-1/5 of traditional duct. Thus pressure of traditional air duct is enough for DurkeeSox system. DurkeeSox system could design fabric permeability and orifices to guarantee the designed air supplying volume without any additional requirements on AHU.


Will a DurkeeSox system generate noise? What is the noise absorption effect ?

A DurkeeSox system does not generate noise and transmit resonance during operating. Pleasers refer to DurkeeSox detailed technical manual. Noise absorption effect depends on different equipments and environment, it could not replace the absorber of AHUs system, although part of noise could be absorbed.