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BEAM PLUS FOR NEW B UILDINGS ENERGY USE (E U)
V ERSION 1.2 E U 4 VENTILATION S YSTEM IN CAR P ARKS
Copyright © 2012 BEAM Society Limited. All rights reserved.
Page 102
4 ENERGY USE 4.2 ENERGY EFFICIENT S YSTEMS
EU 4 VENTILATION SYSTEM IN CAR PARKS
EXCLUSIONS Buildings without carpark or carpark area less than 10% CFA.
OBJECTIVE Encourage energy efficient design and control of ventilation systems in
large mechanically ventilated car parks.
CREDITS ATTAINABLE 2
PREREQUISITES Compliance with the Building (Ventilating Systems) Regulations, Chapter
123J Regulation 4.
CREDIT REQUIREMENT 1 credit for ventilation systems that will consume less electricity than
those meeting the zero credit requirements (baseline) by 20% or more.
2 credits where the consumption is reduced by 25% or more.
ASSESSMENT The baseline (zero credit) performance criteria for mechanical ventilation
systems shall be determined based on the following:
 a mechanical ventilation system that consumes a fan power of 2 W
per l/s of the total ventilation flow rate maintained in the ventilated
spaces in the building; and
 where a space is served by both a supply and an extraction system,
the system fan power shall be the sum of the fan power of the supply
and the extraction system whilst the ventilation flow rate shall either
be the total supply or the total extraction flow rate, whichever is the
larger.
Besides reduction, it is required to demonstrate that the control systems
for regulating the operation of the ventilation systems(s) are provided to
reduce energy use whenever conditions permit.
Examples of control systems referred to in the credit requirements
include variable fan speed control, duty cycling of multiple ventilation
fans according to the CO concentration in car parks, etc.
The Client shall submit the following information to demonstrate that the
installations meet the basic requirements and the requirements for
credits:
 the criteria adopted in the design of the ventilation systems;
 If natural ventilation is adopted, proof must be provided to ensure
that CO and other relevant pollutant concentrations in the car park
should meet the requirements set out in ProPECC PN 2/96[1];
 the calculated ventilation rates;
 the design performance and operating patterns of the ventilation
equipment;
 the energy use predictions for the zero-credit case and the as
designed case for the ventilation system installation;
 reports of air leakage tests on selected ducting systems (to be
confirmed subsequently if the assessment is conducted prior to on-
site testing and commissioning of the ventilation systems); and
 the specified performance of any air-conditioning equipment for the
building.
1 Environmental Protection Department. Practice Note for Professional Persons – Control of Air Pollution in Car Parks 1996).