Ductwork fabricated from the Kingspan KoolDuct System is UL Listed as a Class 1 rigid air duct to Standard for Safety UL 181 when fabricated to a specification clearly defined by UL.
A UL 181 Listed duct system is constructed with specific components that have been tested as part of that duct system and verified by UL-Underwriters Laboratories for compliance to the UL 181 Standard for Factory-Made Air Ducts And Air Connectors.
The UL 181 Listing for the Kingspan KoolDuct system requires that ductwork is fabricated as recommended by Kingspan for KoolDuct, using:
- 20–45 mm Kingspan KoolDuct phenolic panels with silver aluminium facings and with UL labels applied at Kingspan’s factory
- a 63 mm wide (minimum) aluminium foil vapour barrier tape that is UL Listed to Standard for Safety UL 181A Standard for Closure Systems for use with Rigid Air Ducts, with visible UL markings on the foil tape;
- Kingspan KoolDuct High Performance Silicone Sealant / Caulk
- duct-to-duct joints that are part of the KoolDuct UL 181 file, such as the Kingspan aluminium Grip coupling system, the Kingspan aluminium Tiger Clip coupling system and the Kingspan 4-Bolt flange coupling system
To meet Class 1 Air Duct requirements, ductwork must withstand rigorous physical tests e.g. surface burning characteristics; burning; flame penetration; mould growth and humidity; puncture; pressure; erosion; static load; impact; collapse; air leakage; low and high temperatures.
The UL 181 Listing means that not only Underwriters Laboratories has tested and determined that the product meets the specific, defined requirements of Standard UL181, it also means that the manufacturer maintains periodic inspections by UL to assure production of the listed product is in accordance with the listing (KoolDuct UL file number MH25124). Having UL Listing guarantees that the product fully complies with each and every one of UL's requirements in the applicable Standard, and the manufacturer's product can then bear the UL Mark.
Low Air Leakage
The air leakage rate of Kingspan KoolDuct System ductwork can be a fraction of that typical of insulated sheet metal ductwork – up to 80% less¹, and can easily meet the requirements of BS EN 13403: 2003 – Class C, BS EN 1507: 2006 – Class D, HVCA DW 144 – Class D and SMACNA – Class 3.
This can yield significant electrical consumption savings because of reduced heating and cooling loads – saving up to 30% on the annual cost of running a fan². Furthermore, over a 30 year life it can also make a saving of over 20% on operating costs³.
¹ Figure based on research conducted in the US by independent consultants MDA Engineering inc. 2010
² Figure based on research conducted in the UK by independent consultants Rider Levett Bucknall 2005
³ Figure based on research conducted in the UK by independent consultants Cyril Sweett 2007
Lower Embodied Energy
The embodied energy of a ductwork section fabricated from the Kingspan KoolDuct System can be up to 30% less than that for galvanised sheet steel insulated with mineral fibre.
Indoor Air Quality
Distributed air flows over sealed aluminium surfaces, minimising any risk of loose fibres entering the air handling system. In addition, Kingspan KoolDuct panels have a fibre-free insulation core, are non-deleterious, odourless and non-tainting. They will resist attack from mould and microbial growth and do not provide any food value to rodents or vermin.
Kingspan KoolDuct System ductwork can be installed flush to the ceiling eliminating the space required for the manual process of applying the insulation above the ductwork as a second fix. This can save up to 150 - 200 mm of valuable space.
The exceptional strength to weight ratio of ductwork fabricated from the System results in ductwork that is easier to handle and quicker to install. Weighing up to 75% less than sheet metal ductwork, it can overcome severe constraints on structural loadings in older buildings that cannot support additional weight.
The ability to fabricate ductwork in up to 4 m long sections means fewer sections and less handling. This combined with the requirement for fewer supports and its single fix installation results in a fast track installation – up to three times faster. Faster installation obviously means lower costs and less disruption for other trades on site.
Fabricated & Installed by Trained Contractors
To ensure that uniform quality standards are maintained, Kingspan KoolDuct Systemductwork is fabricated and installed only by trained fabricators and installers who have attended a specialised training program and whose competence is continually monitored and controlled.