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BS EN 13141-5:2020

BS EN 13141-5:2020

$142.49

Ventilation for buildings. Performance testing of components/products for residential ventilation – Cowls, assisted cowls and roof outlet terminal devices

Published By Publication Date Number of Pages
BSI 2020 32
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This document specifies methods for measuring:

  1. the aerodynamic characteristics of cowls, fan assisted cowls and roof outlets;

  2. the electrical and acoustic characteristics of fan assisted cowls.

This document is applicable to cowls, assisted cowls and roof outlets used in natural, hybrid or mechanical ventilation and that are meant to be fitted onto ducts which project above the roof surface.

This document does not apply to:

  1. assisted cowls assisted by a device other than a fan (e.g. injection assisted cowls);

  2. roof exhaust fans (see EN 13141-4 ).

PDF Catalog

PDF Pages PDF Title
2 undefined
9 1 Scope
2 Normative references
3 Terms and definitions
10 4 Symbols and abbreviated terms
12 5 Performance testing of aerodynamic characteristics
5.1 Test installation
5.1.1 General
5.1.2 Wind tunnel
16 5.1.3 Maximum permissible measurement error
5.2 Pressure drop
5.2.1 General
5.2.2 Measurements and calculations
17 5.2.3 Test method
5.2.4 Analysis of results
18 5.3 Suction effect of a cowl
5.3.1 General
5.3.2 Measurements and calculations
19 5.3.3 Test method
5.3.3.1 Least favourable horizontal wind approach angle for the suction effect
20 5.3.3.2 Effect of the flow rate
5.3.3.3 Effect of the vertical wind approach angle
21 5.3.3.4 Mechanical effect without wind for fan assisted cowl
5.3.3.5 Combination of mechanical and wind effects for fan assisted cowl
22 6 Performance testing of electrical characteristics
6.1 Test installation
6.2 Electrical power input
6.2.1 General
6.2.2 Measurement
6.2.3 Test method
6.2.4 Analysis of results
23 7 Performance testing of acoustic characteristics of assisted cowl
7.1 General
7.2 Radiative sound power in outdoor space – LWo
7.2.1 General
7.2.2 Test installation
24 7.2.3 Reverberant room method
7.2.3.1 General
7.2.3.2 Anechoic or semi-anechoic room method
25 7.2.3.3 Free field method
26 7.2.4 Measurements
7.3 Sound power level in duct connections of the unit
7.3.1 General
27 7.3.2 Test installation
8 Test report
8.1 General
28 8.2 Aerodynamics characteristics
8.3 Electricals characteristics
8.4 Acoustics characteristics
30 Annex A (normative)Derivation of values through the similitude law
A.1 Similitude law
A.2 Example of application

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BS EN 13141-5:2020
$142.49