BEO Science — ATTMA Accredited Training Provider
ATTMA Level 2 Airtightness
Certification
The advanced qualification for commercial airtightness testing and Green Star compliance — building on your ATTMA L1 to cover multi-fan testing, complex building envelopes, and large-scale reporting. Online theory, in-person workshops, expert-supervised exam.
Prerequisite
ATTMA Level 1 certification is required to enrol in the Level 2 course.
The L2 course builds directly on your existing L1 knowledge and qualification. If you are not yet ATTMA L1 certified, complete the L1 course first — online theory can be started at any time. See beoscience.com/attma-l1course for details.
Who Should Enrol
Designed for L1-qualified testers ready to move to commercial scale
The ATTMA Level 2 qualification extends your scope to non-simple buildings — commercial, industrial, multi-zone, and Green Star projects. If you're an L1-registered tester looking to take on larger and more complex work, this is the natural next step.
L1 Certified Testers
- Upgrade scope to commercial building airtightness testing
- Qualify for Green Star compliance testing projects
- Add multi-fan testing methodology to your practice
- Command higher rates on complex building engagements
Building Performance Consultants
- Expand service range to include Green Star compliance testing
- Lead commercial airtightness testing projects independently
- Provide in-house testing for large commercial clients
Energy Assessors
- Add commercial airtightness testing to your assessor practice
- Support NatHERS, NABERS, and Green Star energy compliance
- Broaden client base across commercial building sectors
HVAC & Ventilation Specialists
- Conduct comprehensive commercial building envelope assessments
- Correlate infiltration data with mechanical ventilation design
- Support commissioning teams on large commercial projects
What Level 2 Adds
Beyond L1 — what the Level 2 qualification covers
ATTMA Level 1 qualifies you to test simple residential and single-zone buildings to TSL1. Level 2 extends that scope to non-simple buildings under TSL2 — larger, more complex, and requiring more advanced testing methodology.
The Core Difference
Multi-fan testing, complex envelope assessment, and commercial-scale reporting.
Standard L1 testing uses a single fan and a straightforward pressurisation sequence. Commercial buildings require multiple simultaneous fans, careful pressure uniformity management across large volumes, and reporting frameworks that satisfy Green Star and building compliance assessors. Level 2 covers all of this — and the planning and execution skills that make complex tests work on the day.
What the Level 2 course addresses
- 01 Multi-fan test methodology — planning and conducting tests using multiple fans simultaneously to achieve uniform pressure across large or compartmentalised buildings. Fan placement, pressure distribution, and validity checks specific to TSL2.
- 02 Non-simple building configurations — airtightness testing for open-plan commercial floors, multi-zone buildings, retail, industrial units, and buildings with complex HVAC penetrations and envelope transitions.
- 03 Green Star compliance testing — understanding what Green Star requires from an airtightness test result, how to structure the test to satisfy the rating tool, and what goes into a Green Star-compliant test report.
- 04 Pre-test planning for complex buildings — site assessments, equipment specification, fan quantity calculations, logistical planning, and coordination with site teams for large commercial tests.
- 05 Reporting for commercial clients and assessors — test reports for commercial projects must satisfy multiple stakeholders. Understanding what certifiers, Green Star assessors, and building owners need from the report — and presenting it correctly — is a core L2 skill.
Course Structure
Online theory. Hands-on workshop. Expert-supervised exam.
The same proven three-module structure as the L1 course — online foundations at your own pace, followed by intensive two-day in-person practical training, and a supervised certification exam.
Theory — Online, Self-Paced
Principles of multi-fan blower door testing. Air permeability, infiltration, and large-building airtightness. ATTMA TSL2 standards, methodology, and compliance requirements. Planning and executing complex building tests. Equipment setup, calibration, and troubleshooting in commercial contexts. Green Star airtightness requirements. Interactive video lessons, quizzes, and downloadable reference materials. Monthly live Q&A access included. Start anytime — no fixed schedule.
Practical Workshop — In-Person, Two Days
Two-day intensive commercial building airtightness testing workshop. Set up and calibrate multi-fan blower door equipment. Conduct air leakage testing on a real commercial building. Identify and locate air leaks in complex envelope configurations. Interpret results and complete ATTMA TSL2 test reports. Small group format — personalised instruction throughout. Expert trainer supervision from pre-test planning through to results analysis. Held every 8–12 weeks across Auckland, Wellington, Christchurch, and Queenstown.
Certification Exam — In-Person, Scheduled with Workshop
Written exam covering ATTMA TSL2 protocols, multi-fan methodology, and airtightness principles for commercial buildings. Practical exam — conduct a full supervised commercial blower door test. Immediate results and written feedback. ATTMA Level 2 credential issued on passing. Resit available at $750 + GST if required. Recognised by Green Star assessors, councils, and building compliance professionals across NZ and AU.
Workshop locations and dates — 2026
Workshops are two days and held across four NZ locations. Planned dates for 2026 are below — final dates to be confirmed. Register your interest to be notified.
Certification Options
Full package or individual modules
Choose the complete certification package and save, or enrol in modules individually for flexibility. Individual modules total $2,900 + GST — the full package saves $105.
Full Certification Package
ATTMA Level 2 — Complete $2,795 + GST
Everything you need to achieve ATTMA Level 2 certification — theory, two-day practical workshop, and exam in one package. Includes all training materials, monthly live Q&A access, and post-certification support.
- Module 1 — Theory (online, self-paced, start anytime)
- Module 2 — Two-day practical workshop (in-person, supervised)
- Module 3 — Certification exam (written + practical)
- All training materials and reference documents
- Monthly live Q&A sessions with trainers
- Post-certification support
- ATTMA Level 2 credential on passing
Individual modules
Already completed theory training elsewhere? Or need to complete modules at different times? Each module is available individually.
- Start anytime — no fixed schedule
- Return to sections as needed
- Upgrade to full package at any time
- Auckland, Wellington, Christchurch, Queenstown
- Scheduled every 8–12 weeks
- Pre-reading: Module 01 recommended first
- Scheduled alongside practical workshops
- Green Star and NZ/AU compliance recognised
- Resit available — see below
Pricing & Support
Group discounts, flexible payment, employer sponsorship
Enrol three or more from the same organisation and receive 10% off the full package. Invoice addressed to the employer directly.
$2,515 per person (save $280)Spread the full package cost across three monthly instalments at no extra charge. Card or invoice accepted.
3 × $932 + GST · no surchargeFull documentation pack to support employer reimbursement — course outline, learning outcomes, CPD hours, and supporting letter.
Documentation free of chargeChoosing Your Path
Which option is right for you?
Find your starting point
BEO Science Courses
How ATTMA L2 fits within the BEO course range
BEO Science delivers three ATTMA courses covering different technical standards and building types. The L2 sits between the entry-level L1 and the specialist PH+ course.
| ATTMA L1 | ATTMA L2 | ATTMA PH+ | |
|---|---|---|---|
| Standard | TSL1 — Simple Buildings | TSL2 — Non-Simple Buildings | TSL4 — Passive House & Low Energy |
| Building type | Standard dwellings and simple buildings | Commercial, multi-zone, large and complex buildings | Passive House, low energy, high-performance |
| Key focus | Test procedure, equipment, standard reporting | Multi-fan testing, complex envelope, Green Star | Volume methodology, PH-specific reporting |
| Delivery | Online theory + in-person workshop and exam | Online theory + two-day in-person workshop and exam | Fully online, self-paced, internationally available |
| Prerequisite | None | ATTMA Level 1 | None (L1/L2 for ATTMA endorsement) |
| Credential | ATTMA L1 registration | ATTMA L2 registration | PH ✓ added to existing ATTMA profile |
| Package price | $2,500 + GST | $2,795 + GST | Online only — see PH+ page |
Not yet ATTMA L1 certified? Complete the L1 course first — it's the entry point for all ATTMA testing qualifications. See beoscience.com/attma-l1course. Working on Passive House projects? The ATTMA PH+ course is available online at any time alongside your L2 — see beoscience.com/attma-phplus.
FAQ
Common questions
Do I need to hold ATTMA L1 to enrol?
Yes. ATTMA Level 1 certification is required before enrolling in the Level 2 course. The L2 builds directly on L1 knowledge and testing practice. If you are not yet L1 certified, complete the L1 course first — online theory can be started at any time at beoscience.com/attma-l1course.
How is the practical workshop different from the L1 workshop?
The L2 practical workshop is two days (compared to one day for L1) and is conducted on a commercial building rather than a residential one. The focus shifts to multi-fan setup and coordination, pressure uniformity management across large volumes, and producing reports that satisfy Green Star and commercial compliance requirements.
Does the L2 qualification qualify me for Green Star airtightness testing?
Yes. ATTMA Level 2 certification qualifies you to conduct airtightness tests on non-simple buildings in accordance with TSL2, which is the required standard for Green Star compliance testing in NZ and AU. The course specifically covers Green Star reporting requirements so you understand what the rating tool assessor needs from your test report.
Where are workshops held and how often?
Workshops are held in Auckland, Wellington, Christchurch, and Queenstown every 8–12 weeks. Planned 2026 dates: Auckland (February), Wellington (April), Christchurch (October), Queenstown (November). Final dates to be confirmed — register your interest to be notified first.
What if I don't pass the exam first time?
An exam resit is available at $750 + GST, covering the full exam day — both written and practical components. Resits are scheduled alongside regular workshop dates. You'll receive written feedback after the first attempt to help you prepare.
Can I take L2 and PH+ at the same time?
Yes. The ATTMA PH+ course is fully online and self-paced — there's no reason you can't work through the PH+ theory alongside your L2 theory module, and sit both when ready. They cover different technical standards (TSL2 for L2, TSL4 for PH+) and complement each other well for testers working across both commercial and Passive House projects.