Pick up where you left off.
Course Content
Blower Door Testing for NatHERS Assessors
A blower door result changes nothing on your certificate, and almost everything about the build.
Reading the result and using it in the rating. Read a test report before you trust its number, see how a regulation mode rating calculates its own air leakage from the components you enter, compare the two on the same scale without overclaiming, and use the result at design, documentation and completion, with the ventilation question a tight house raises.
Secure card checkout. Tax invoice emailed.
4 modules, 2 case studies, final quiz and certificate.
Introduction and objectives
Why a test result changes the rating not at all directly and a great deal indirectly, and the four things you will be able to do by the end.
What a Blower Door Actually Measures
Read the metric, the preparation method and the construction stage before the number, and keep fifty pascals apart from natural infiltration.
How the Rating Models Air Leakage
See which of your inputs move the modelled leakage, what the Technical Note defaults assume, and why a measured result cannot go into a regulation rating today.
Reading the Result Against the Model
Put the test and the model on the same scale, trace a leakier result to the build and a tighter one to the ventilation question, and keep the certificate clean.
Using the Test Across the Project
Advise at design stage, write a target the builder can price, check the completion test against the rated house, and explain the number to the client.
Case Studies
A very tight house with no fresh air plan, and a downlight schedule nobody updated, read result by result.
Summary and Key Takeaways
The six habits to carry into the next test report that lands on your desk.
Final quiz and certificate
Ten project scenarios. Pass and the certificate goes straight into your dashboard.
Intermediate. For assessors who already rate Class 1 houses in regulation mode, and the builders, designers, surveyors and services engineers who commission or read a blower door test. Covers the test method and its metrics, the NatHERS treatment of air leakage, Part 13.4 building sealing, the NCC Verification Methods that use a test, the comparison with the model and the advice that follows. It teaches no software operation, names no products, and does not replace the NatHERS Technical Note or AS/NZS ISO 9972.
Written for the people who have to say what a test result means.
Energy Assessors
The report lands on your desk unasked, and the client wants to know what it did to the stars.
Licensed Builders
A completion test is the first independent check that the sealing in the documents was actually built.
Building Designers
An airtightness target only works when the specification states the figure, the metric, the standard and the stage.
Building Surveyors
The Verification Methods that use a test sit outside the certificate, and a result of five or below brings a ventilation requirement with it.
HVAC and Building Services Engineers
A very tight house needs designed fresh air, and the rating will never raise that question for anyone.
Where this hour goes on your record.
National Standard of Competency for Architects (NSCA 2021) performance criteria this course aligns with:
Building codes, standards and planning advice
Building science in conceptual design
Sustainable environmental systems
Materials and performance standards
Defects, rectifications and substitutions
| If you are | How it is recorded |
|---|---|
| An energy assessor | 1 hour of technical CPD on the NatHERS Technical Note, building sealing and the reading of blower door test evidence. Your certificate, the learning outcomes, the module outline and your quiz result are kept in your dashboard for your accrediting organisation’s records. |
| An architect | 1 formal CPD point. Aligned with NSCA 2021 performance criteria PC12, PC28, PC33, PC45 and PC56. |
| A builder, building designer, surveyor or services engineer | 1 hour of CPD on airtightness testing, building sealing and NatHERS documentation practice, recorded on your certificate for your registration body or state scheme. |
CPD On Demand is not a registered training organisation and courses are not accredited by any registration body. Each course is aligned with the relevant competency frameworks and gives you the records to evidence it. CPD rules differ by registration body and state, so check with yours if you are unsure.
Pairs well with.
When the Spec Doesn’t Say Enough
Reading a specification as evidence, so every non-default input has a number, a source and a place in the documents.
What to Expect From a NatHERS Audit
The records an auditor asks for, including the defaults and the judgements behind every certificate.
Thermal Bridging in Residential Design
The other part of the envelope the rating models from components rather than measures on site.
Before you enrol.
Read the next blower door report with confidence, in one self-paced hour.
$99, 60 minutes, certificate on completion.