Fresh Ventilation Now Offering Professional Blower Door Testing Across NSW

Fresh Ventilation is proud to offer blower door testing and air tightness testing across the Southern Highlands, Wollongong, Goulburn, Sydney and surrounds. Our director, Cameron Grant, is now a registered Air Tightness Tester with ATTMA and is Level 1 accredited. Next up, we’re aiming to add PassivHaus accreditation when the next course is held — continuing our focus on high-performance, energy-efficient homes.

Quick facts
• ATTMA Level 1 accredited air tightness tester
• Residential & light-commercial testing
• Detailed leakage reports with practical fixes
• Seamless integration with HRV/ERV design

What Is a Blower Door Test?

A blower door test gently pressurises or depressurises a building using a calibrated fan and digital manometer to measure air leakage. The outcome is typically expressed as ACH50 (Air Changes per Hour at 50 Pascals). Lower values indicate a more airtight building, which improves comfort and energy performance.

Blower door fan in an external doorway during airtightness testing — Calibrated fan and manometer used to measure building air leakage.

Why Airtightness Matters

Healthier indoor air: Control where air enters so it can be filtered, reducing pollutants, moisture and allergens.
Energy efficiency: Reduce unwanted draughts and heat loss, improving HVAC and HRV/ERV efficiency.
Moisture control: Lower the risk of condensation, dampness and mould growth.
Comfort: Eliminate cold spots and maintain stable indoor temperatures.

Who Benefits from Blower Door Testing?

New builds targeting best-practice energy performance or PassivHaus.
Renovations improving the thermal envelope and weather-tightness.
Compliance evidence for energy assessors, certifiers and NCC 2022 energy provisions.
Homeowners wanting data-driven recommendations to reduce bills and improve comfort.

Our Process: Clear, Accurate, Actionable

Pre-test review: We discuss building details, stage of construction and target airtightness (ACH50).
Site setup & testing: Calibrated fan installed, baseline established, pressurisation/depressurisation tests completed.
Leak detection: Smoke pencil/thermal imaging (where appropriate) to pinpoint pathways.
Report & improvements: You receive an ATTMA-aligned report with practical fixes and prioritised actions.

Why Choose Fresh Ventilation

ATTMA Level 1 accredited testing led by Cameron Grant.
15+ years in ventilation design, installation and commissioning.
End-to-end support: From airtightness testing to HRV/ERV design and installation.
Local coverage: Southern Highlands, Illawarra, Sydney, Goulburn and Canberra regions.

Typical Targets & Results

Every building is different, but as a guide:

Good new build: ~ 5–7 ACH50
High-performance: ~ 1–3 ACH50
PassivHaus target: ≤ 0.6 ACH50

We’ll help you set realistic targets for your project and provide a clear pathway to reach them.

Service Areas

We regularly test in: Bowral, Mittagong, Moss Vale, Robertson, Wollongong, Shellharbour, Kiama, Nowra, Goulburn, Canberra and the Greater Sydney area (including North Shore, Inner West, Eastern Suburbs, Sutherland Shire and Hills District).

FAQs

How long does a blower door test take?

Most homes take 60–120 minutes on site, depending on complexity and whether we carry out extended leak-finding.

Do I need to prepare the house?

Close external doors and windows, ensure internal doors are accessible, and turn off combustion appliances during the test. We’ll brief you fully beforehand.

Is the test safe for the building?

Yes — standard test pressures are mild (50 Pa) and pose no risk to typical buildings.

Can you help fix air leaks?

Absolutely. Your report includes prioritised recommendations, and we can scope remedial works and integrate HRV/ERV where appropriate.

Book a Blower Door Test

Ready to measure and improve your home’s performance? Book a blower door test with Fresh Ventilation today.

Phone: Call Fresh Ventilation
Email: info@freshventilation.com.au
Enquiry form: Contact us

Our company entry in the ATTMA Registered Air Tightness Testers database.

Testing our own soon-to-be-certified PassivHaus office, which we believe is the most airtight building in Australia at 0.05 ACH50 — Testing Fresh Ventilation's soon-to-be-certified PassivHaus office, which we believe is the most airtight building in Australia at 0.05 ACH50.

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Blower Door Testing & Air Tightness Services NSW | Fresh Ventilation