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1. General Information

Regular cleaning including air duct cleaning and ventilation duct cleaning and maintenance can improve the performance of the Durkee textile duct system and guarantee excellent indoor air quality and optimum air dispersion, different air dispersion models and working environments (dust capacity) decide the different periods of cleaning and maintenance. 

2. Maintenance Period Description 

Following is the advised maintenance period of the general situation. 

2.1 Durkee—EJ 100% Eject without Permeation. 

Made of non-porous fabric, and usually installed in higher space, So system cleaning and maintenance requirement is not an immediate concern. According to the different work environment requirements, generally, we suggest the cleaning period is three to five years. 

2.2 Durkee—PE Permeation with Injection

Made of less permeable fabric, most of the airflow is distributed through orifices; fabric blockage is not our direct concern. Additionally, the system is usually installed in higher space, According to different working statuses, the generally advised cleaning period is two to three years. 

2.3 Durkee—PS Permeation with Slots

Made of various permeation fabrics, part of the air is distributed through the fabric, and the system is usually installed in lower space, so when it is discovered that fabric is seriously soiled and worked under lower efficiency, or there is obvious dust on the system surface, we need to clean system. According to different working conditions, the generally advised cleaning period is one to two years. In the cases of extremely dirty, the fabric may become discolored as the cleaning. 

2.4 Durkee—PM 100% Permeation

Usually, applications are in refrigerated, cooling systems such as food processing, and regular and effective maintenance is particularly important. If the system operates dirty or soiled or for a long time without maintenance, it may result in permeability failure or less life of the system, According to the different working conditions, the generally advised cleaning period is every 3 months to half-year is better. When cleaning, take down every part from the suspended device, then turn out the dirty surface and wash.

3. Durkee Maintenance Procedures & Instruction

3.1 Remove Durkee fabric ducts. 

3.1.1 Firstly plan laundering time, making a laundering schedule according to the drawing and job site situation. 

3.1.2 After confirming the laundering schedule, arrange workers and tools which use for take-off ducts. Checking the location and removal procedures of each Durkee fabric duct according to the drawing, remember to mark it as correctly for all the ducts to avoid missing removal or installation mistakes. 

3.1.3 Confirm AHUs are turned off and Durkee textile ductwork is in the non-work state. Clear away some sharp objects below or take the proper protection to avoid any potential damage to Durkee fabric air ducts while removing them. 

3.1.4 Check the location of each zipper connection, from the inlet (The join part between metal ducts with Durkee duct) to turn the zipper cover-up sleeve out and unfasten the zipper, then retract the fabric duct till to the next zipper unfastened to remove this part together, make the proper marks please! When taken down to the end part please loosen the fixed snap clip and remove them together with the endcap. 

3.1.5 According to the above procedures, remove and wash ducts step by step as per the laundering schedule.

3. 2 Laundering Instruction: 

3.2.1 Turn the dirty side out, and soak in cold water for 15 to 30 minutes without any softener; 

3.2.2 Cold water washing (water temperature should be less than 35℃), do not overexert to wrest. 

3.2.3 Rinse thoroughly, and drip-dry or dry by airing in the shade, do not insolate to avoid any crimple or shrinkage by high temperature. 

3.2.4 A serious dirty system might need to be cleaned more than once. 

3.2.5 The laundering eligible standard is: surface clean without dust, the accessories of the zipper, hanger, etc are in good condition. 

3.2.6 A big project may need separate maintenance for several laundering times, once one part, please carefully inspect and confirm the quantity according to the drawing, avoid missing laundering and losing!

3. 3 Installation after washing. 

3.3.1 Identify all marks or labels of washed ducts according to the drawing. 

3.3.2 Find out the Durkee fabric ducts that need to be installed, hang the snap clip of ducts from the first section to the end section one by one, please to avoid any barrier to clamp snap. 

3.3.3 Connected by zipper for each section in the correct order. Make sure all zippers are covered by a protective sleeve. 

3.3.4 Straight the Durkee system after installation and fix the snap clip to the end part to avoid fabric duct drawback. 

3.3.5 Inspect the whole Durkee system is straight and neat without damage before starting work.


Making a laundering schedule does not influence to owner’s normal working.

2. Please refer to the actual situation If any discrepancies between the drawing and the actual situation. 

3. Please pay attention to duct labels on the site of each zipper connection. 

4. The above methods are applied for the galvanized cable suspension, For the aluminum track suspension model just slide out & into the end of the Durkee system will be ok! 

5. We suggest Durkee detergent for exclusive use. 

6. For extremely dirty, it would be possible for little color change to deepen during the laundering, we suggest adding an M-efficiency diffuser or Durkee fabric diffuser

4. Durkee System Storage Method

Please properly store for Durkee system in case of do not use it for a long time to ensure cleanness and extend the lifecycle of the Durkee system. 

4.1 After stopping using, Firstly confirm whether the both inside & outside of Durkee are clean, or launder it if necessary. (Please refer to the above laundering method). 

4.2 Please remove the Durkee system as per the procedures above. Please copy the marked drawing and save it in the package. 

4.3 Please pack & seal the removed ducts in time, and affix them to the instruction mark for the convenience of future installation. 

4.4 Please count records in time to avoid loss after removing & packing the Durkee system. 

4.5 Please keep Durkee in a dry & ventilation environment. 4.6 Recheck the Durkee system before removing & preservation, and check whether the surface of Durkee is in good condition.

For any further questions, please call your local distributor or our service line in China. 86-400-8822-068