Clip ducting is manufactured here in our UK Factory.
The standard length is 1250mm
It is modular and can be added too and taken apart with clips! with ease.
Modular ducting with the clip’s ease of use means it is the quickest most adaptable, best solution
With the standard length not being 20 ft like spiral, moving a machine or taking a visual inspection has never been so easy.
Just undue a clip and remove a length with out compromising the system, with clip ducting you can remove the whole system and replace parts.
Cleaning and breakage of duct runs is most common, save time with clip ducting with everyday running installation and maintenance.
https://norduct.com/ on this page you can see our factory producing the Clip ducting
The below paragraph is taken from the following Link
Taken from wiki https://en.wikipedia.org/wiki/Duct_(flow)#Duct_cleaning
“In commercial settings, regular inspection of ductwork is recommended by several standards. One standard recommends inspecting supply ducts every 1–2 years, return ducts every 1–2 years, and air handling units annually. Another recommends visual inspection of internally lined ducts annually Duct cleaning should be based on the results of those inspections.
Inspections are typically visual, looking for water damage or biological growth. When visual inspection needs to be validated numerically, a vacuum test (VT) or deposit thickness test (DTT) can be performed. A duct with less than 0.75 mg/100m2 is considered to be clean, per the NADCA standard. A Hong Kong standard lists surface deposit limits of 1g/m2 for supply and return ducts and 6g/m2 for exhaust ducts, or a maximum deposit thickness of 60 µm in supply and return ducts, and 180 µm for exhaust ducts. Another UK standard recommends ducts cleaning if measured bacterial content is more than 29 colony forming units (CFU) per 10 cm2; contamination is classified as “low” below 10 CFU/cm2, “medium” at up to 20 CFU/cm2, and “high” when measured above 20 CFU/cm2. ”