EN 15727:2010 – Ventilation for buildings – Ducts and ductwork components, leakage classification and testing
1 Scope
This European Standard applies to technical ductwork products, intended for installation in ductwork conforming to EN 1505 and EN 1506, used in air conditioning and ventilation systems defined in the scope of CEN/TC 156. This document specifies the leakage requirements for technical ductwork products, i.e.
components in the ductwork that has more functions than conveying air, such as sound attenuators, filter boxes and duct fans, etc.
The following products are not within the scope of this document:
ductwork components like bends, reducers, ducts and T-pieces. EN 12237 and EN 1507 apply;
flexible ducts according to EN 13180;
ducts made of insulation ductboards according to EN 13403;
dampers according to EN 1751;
air handling units according to EN 1886.
This document is a parallel standard to EN 12237, EN 1507 and EN 1751, based on the same leakage classification.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
EN 1505, Ventilation for buildings ― Sheet metal air ducts and fittings with rectangular cross section ― Dimensions
EN 1506, Ventilation for buildings ― Sheet metal air ducts and fittings with circular cross-section ― Dimensions
EN 12792:2003, Ventilation for buildings ― Symbols, terminology and graphical symbols
3 Terms, definitions and symbols
3.1 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 12792:2003 and the following apply.
3.1.1
nominal diameter
d n
nominal diameter according to EN 1506 for ductwork of circular cross-section
3.1.2
side lengths a and b
side lengths according to EN 1505 for a ductwork of rectangular cross-section
3.1.3
total joint length
L
total length of the periphery of the joints of the connections of the technical products
3.1.4
product surface area
A p
actual external envelope surface area for the technical ductwork product under test, excluding possible flanges and insertion parts
3.1.5
virtual product surface area
A c
quantity used for calculation of the permitted leakage for the product under test according to this document
NOTE A c may deviate from the product surface area.
3.1.6
test pressure
p test
static pressure difference between the pressure within the product to be tested and the pressure of the ambient air
3.1.7
static pressure limit
p s
maximum design operating pressure for the ductwork according to its air tightness class
NOTE The static pressure limits, positive and negative, for the appropriate air tightness class are specified in Table 3 and Table 4.
3.1.8
air leakage rate
q vl
air leakage flow rate of the product under test
3.1.9
measured air leakage rate
q vlmeasured
air leakage flow rate before correction of temperature and atmospheric pressure (see 7.4)
3.1.10
air temperature
t
temperature of the ambient air during the test
3.1.11
atmospheric pressure
p a
barometric pressure of ambient air during the test
3.1.12
tightness factor
f c
leakage flow rate per unit surface area of the product
EN 15727:2010 – Ventilation for buildings – Ducts and ductwork components, leakage classification and testing