Broadmeadows Primary School
In 2011, Roderic Bunn revisited Broadmeadows Primary School in Melbourne to see how construction of the ground-coupled ventilation system was progressing, and how the designers were using innovative low-energy light sources.
This article originally appeared in BSRIA’s Delta T magazine January 2011. It has been posted here by --BSRIA.
Innovation can fall into one of two camps: that which fulfils a client’s craving need, or that which fulfills a designer’s craving desire. Satisfying both is quite rare, especially with ostensibly active green technologies that often create more management and maintenance than clients have been lead to expect.
Innovation in passive engineering, on the other hand, can lead to far more robust fit-and-forget installations.
In June 2010, Delta T reported on the construction of Broadmeadows Primary School in Melbourne, Australia, where the architect (Now Achitecture) aimed to cool the school’s supply air by drawing it through water-encased foundations (‘Pooled Resource’, Delta T June 2010). BSRIA took the opportunity to revisit the site in November 2010 to see how the project was shaping up.
Broadmeadows is notable as it signals a major shift in Australian school design. The passive engineering is far more akin to UK design practice than traditional Australian engineering, which tends to air-condition or mechanically ventilate as a matter of course. Here, ventilation relies on a natural thermosyphon, where supply air, up to 40°C in summer, is drawn through the water-encased ducts and injected into the occupied space. Air rises through internal heat gains and wind-assistance to be exhausted at high level.
A high quality of construction, particularly fabric airtightness, is required to ensure that the thermosyphon operates correctly. Heat gains from lighting and small power need to be strategically located, based on intrinsically efficient equipment, and well controlled. To this end the architect specified the use of light-emitting diode (LED) lamps for the sports hall. With sports hall lighting usually very energy-intensive, LEDs might just be the great get-out-of-gaol card that school designers are seeking.
It will be useful to see if the LEDs deliver comparable light at a much lower wattage.
The images below show the developing aspects of this revealing project. Delta T intends to report on the performance of the school once it is operating.
Above. Fluorescent luminaires in recessed fittings or metal halide lamps in a pendant fitting would usually be appropriate for a high-bay sports hall of the kind provided at Broadmeadows. Instead, the architect opted for a Chinese-made Zhejiang LED Pendant fitting of 120 W (100 x 12 W LED arrays), around half the wattage of a conventional pendant lamp suitable for this context. The gross weight of the fitting, with a glass light deflector, is under 14 kg. The supplier quotes a life of 30,000 h, a luminous flux of 9,600 lm, and a beam angle of 130 degrees.
Above. Good levels of airtightness at junctions of walls to floors and roofs, as well as around penetrations such as windows, will be vital for ensuring that the thermosyphon effect is maintained. The architects are aware that Australian builders are on a steep learning curve — not supported by any requirements for airtightess testing in the Australian building codes — and that very good levels of sealing will be needed.
Above. The intake ducts, taped off and yet to be finished off with cowls, adjacent to the school’s external walls.
Above. Passive design doesn’t mean that user controls should be basic. If anything, the user controls need to be designed with even greater care so the occupants know precisely what button to press to get the desired effect. Automatic lighting controls often alienate building occupants when they turn on and off nonsensically. A lack of manual override can compound the problems. At Broadmeadows, lighting can be switched between automatic and manual control using very intuitive and well-labelled switches.
[edit] Find out more
[edit] Related articles on Designing Buildings Wiki
Featured articles and news
Design and construction industry podcasts
Professional development, practice, the pandemic, platforms and podcasts. Have we missed anything?
C20 Society; Buildings at Risk List 2025
10 more buildings published with updates on the past decade of buildings featured.
Boiler Upgrade Scheme and certifications consultation
Summary of government consultation, closing 11 June 2025.
Deputy editor of AT, Tim Fraser, discusses the newly formed society with its current chair, Chris Halligan MCIAT.
Barratt Lo-E passivhaus standard homes planned enmasse
With an initial 728 Lo-E homes across two sites and many more planned for the future.
Government urged to uphold Warm Homes commitment
ECA and industry bodies write to Government concerning its 13.2 billion Warm Homes manifesto commitment.
From project managers to rising stars, sustainability pioneers and more.
Places of Worship in Britain and Ireland, 1929-1990. Book review.
The emancipation of women in art.
Call for independent National Grenfell oversight mechanism
MHCLG share findings of Building Safety Inquiry in letter to Secretary of State and Minister for Building Safety.
The Architectural Technology Awards
AT Awards now open for this the sixth decade of CIAT.
50th Golden anniversary ECA Edmundson awards
Deadline for submissions Friday 30 May 2025.
The benefits of precast, off-site foundation systems
Top ten benefits of this notable innovation.
Encouraging individuals to take action saving water at home, work, and in their communities.
Takes a community to support mental health and wellbeing
The why of becoming a Mental Health Instructor explained.
Mental health awareness week 13-18 May
The theme is communities, they can provide a sense of belonging, safety, support in hard times, and a sense purpose.
Mental health support on the rise but workers still struggling
CIOB Understanding Mental Health in the Built Environment 2025 shows.
Design and construction material libraries
Material, sample, product or detail libraries a key component of any architectural design practice.