AIR IRAH NSW Di Division M n Meeting ng Critical Up l Updates - - PowerPoint PPT Presentation

AIR IRAH NSW Di Division M n Meeting ng Critical Up l Updates Australi lian S n Stand ndards & & B BCA 24 24th

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June ne 2 2014

Presented by Owen Ryan Business Development Manager Aeroseal Duct Sealing Pty Ltd

AS 4254.2- 2012 Duct Leakage Testing

Originally Presented by: Mark Jacobson – National BIM Operations Manager AIRAH Brisbane Meeting 18th March 2014

• Building Code of Australia (BCA) 2013
• AS 4254.2 2012 Section 2.2.4
• DW 143 – A Practical Guide to Ductwork Leakage Testing
• CIBSE Code A; Air Distribution Systems, Section AA2.5

Leakage Testing – Standards & Guidelines

• AS 4254 – 2002 was the previous applicable standard
• No requirement for field leakage testing was required, only

design allowances

• Focus was on construction and material requirements

AS 4254 - 2002

• AIRAH DA 09 adopts a 5% duct leakage
• This equates to a fan delivery requirement of 105% to

achieve design

• The increase in airflow equates to a 16% increase in power

consumption

• Supply duct can sweat at leakage point
• Return duct leakage adds to plant heat load
• Chillers and cooling towers have to work harder
• Early testing has found on average a 10% leakage rate which

equates to a 33% increase in power consumption

Duct Leakage Testing – Why Does It Matter?

• Test 10% of each system – test must include a portion of

the floor distribution, risers, seam types, plantroom duct, etc

• Test leakage performance at 1.25 times the calculated
• perating pressure in the tested section of duct
• Leakage is not to exceed 5% of the test branch design air

quantity

• Tested in accordance with DW 143, Appendix B

AS 4254.2 - 2012 Testing Parameters

Testing Equipment (TSI PANDA)

Testing Setup

• Clearly defines how the system will be tested (positive or

negative)

• Allow for leakage test points in risers so you don’t have to

test the system as a whole

• Discuss with the duct manufacturer the acceptable sealing

methods (detailed within AS 4254.2 – 2012)

• Discuss with the site install team how risers will be installed
• Get on site early and test completed sections to ensure

compliance

• Carry out test before insulation of ductwork
• Sources of leaks include Joints, VAV boxes, fire dampers,

access hatches, duct heaters, etc.

Final Thoughts

Duct leakage cost $$’s - especially on large high rise buildings

Riser Sealing Issues

Bolts are

• ften missed

due to poor access Cleats are

• ften missed

due to poor access

Aeroseal Technology

Aeroseal Duct Sealing tackles leaks from the inside out.

The Aeroseal process puts escaping air under pressure and causes Low VOC Vinyl Acetate Polymer particles to stick first to the edges

• f a leak, then to each other until the leak is closed.

By isolating the ducts and using computer based software, our technicians are able to accurately measure the original duct leakage and improvement achieved with the Aeroseal process in your system.

Benefits Airtight Savings Airtight Comfort

• Reduces Energy Waste
• Saves Energy and Money
• 90% Reduction in Leaks
• Improves Comfort & Indoor Air Quality
• Enhanced Building Pressurisation
• Safe Effective Sealant Solution

Would you like to Learn more?

Please speak to me after the meeting for any further information

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We will be conducting Lunch’n’Learn sessions

We are looking for Sample and Case Study projects We wish to provide you and your clients with a cost-effective, state-of-the-art solution to your duct air leakage issues

Any Questions ???