1. Resistance Against Pressure Test
The Resistance Against Pressure test determines the fitness for purpose of the ductwork assembly without reinforcements and measures how well the duct can withstand the test pressure without rupture. The mandatory requirement for air duct resistance against pressure is achieved by meeting the maximum pressure of 2.5 times the manufacturer’s rated positive pressure without rupture.
2. Air Leakage Factor and Air Tightness Test
The duct system is tested for air leakage/air tightness and bulging/caving in accordance with EN 1507 (Ventilation for buildings. Sheet metal air ducts with rectangular section. Requirements for strength and leakage). The air leakage in the system should meet an air leakage factor and rate listed to achieve either Class A, Class B or Class C classification.
3. Microbial Growth Test
The Microbial Growth test measures resistance to microbial growth and to the effects of high humidity. The samples are kept for 60 days in an atmosphere saturated with water vapour.
4. Board Stiffness Test
The Board Stiffness test tests the system for the minimum required rigidity. The board stiffness class will be determined by the minimum flexural rigidity of the preinsulated ductboard sample.
5. Water Vapour Resistance Test
The Water Vapour Resistance test ensures that the ducts, held at a certain humidity, will maintain the humidity level and will not allow condensation to occur. The system samples are placed in a climatic chamber with 50% relative humidity. The water vapour resistance of the duct should not be less than 140 m2 h Pa/mg for the outer facing.
6. Dimensional Tolerance Test
The Dimensional Tolerance test will produce minimal tolerance on the length, width and thickness of the pre-insulated ductboards. The ductboard length shall not exceed ±2%, the width ±1.5%, and the upper and lower deviations of the thickness shall not exceed +2.0mm -1.5mm.
7. Sound Absorption Test
The ductboard should be tested for sound absorption performance, to provide a rating which is useful for comparison. A reverberation chamber is used to carry out weighted acoustical absorption of the ductboard.
8. Thermal Properties Test
Thermal resistance and thermal conductivity is based upon measurements carried out in accordance EN 12667 (Thermal performance of building materials and products. Determination of thermal resistance by means of guarded hot plate and heat flow meter methods. Products of high and medium thermal resistance) or EN 12939 (Thermal performance of building materials and products. Determination of thermal resistance by means of guarded hot plate and heat flow meter methods. Thick products of high and medium thermal resistance) and is determined by following the specific insulation product standard.
9. Reaction to Fire Test
The Reaction to fire classification is tested in accordance with EN 13501-1:2007 (Fire classification of construction products and building elements. Classification using test data from reaction to fire tests). The Euroclass system categorises construction products into one of seven reaction to fire classes ranging from the highest (best) class of A1 to the lowest (worst) class of F, depending upon their performance in application, in defined tests or a defined combination of tests.
Erosion and Emission of Particles*
The Erosion and Emission of Particles test measures resistance to erosion when air is passed through typical ductwork sections at a velocity of two and one-half times the manufacturer’s rated velocity. The duct should not erode or break away during the test, to show that the duct can withstand maximum air speed as recommended by the manufacturer.
Supports and Hangers
The ductwork should fulfill requirements specified in EN 12236 (Ventilation for buildings. Ductwork hangers and supports. Requirements for strength).
Facilities for Cleaning
Ductboard shall not show erosion or evidence of delamination as per the requirements specified in ENV 12097 (Ventilation for buildings. Ductwork. Requirements for ductwork components to facilitate maintenance of ductwork systems) during and after 20 cleaning simulations, which is equivalent to a lifecycle of 20 years (one cleaning per year).
Health and Safety
The insulation materials used in the ductboards should not be listed in the Directive 67/548/EEC Annex 1 and should be noncarcinogenic fulfilling the requirements
*PalDuct PIR is not tested to Erosion and Emission of Particles.