Blower Door Testing & Air Tightness Services
Accredited Blower Door Testing Across NSW & ACT
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. We are a family-owned and operated business based in the Southern Highlands, delivering professional blower door services across Sydney, the South Coast, Southern Highlands, Blue Mountains, Goulburn region and Canberra.
If you are searching for:
- Blower door testing near me
- Air tightness testing services
- Air leakage testing experts
- Blower door test Sydney
- Blower door testing Southern Highlands
- Airtightness testing Canberra
- NCC 2022 air leakage compliance testing
- ACH50 testing services
- Passive House airtightness testing
- Pre-plaster blower door test
- Final stage air tightness verification
We provide professional blower door testing and airtightness services for new homes, renovations and high-performance builds across NSW and the ACT.
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.
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.
Areas We Service
We regularly conduct blower door testing and air tightness services in:
Sydney & Surrounds
We test across Sydney Metro and surrounding regions, including:
- Lower North Shore – Mosman, Cremorne, Neutral Bay, Lane Cove, Chatswood, Roseville and Pymble
- Northern Beaches – Manly, Avalon and Palm Beach
- Eastern Suburbs – Bondi, Bronte and Maroubra
- Inner West – Balmain, Leichhardt and Five Dock
- Western Sydney – Parramatta and Strathfield
- North West Sydney – Kellyville and Castle Hill
- South West Sydney – Liverpool and Campbelltown
- Penrith Region & Blue Mountains
- Cronulla & Sutherland Shire
Illawarra & South Coast
We test all along the South Coast, including:
- Wollongong
- Stanwell Tops
- Helensburgh
- Albion Park
- Kiama
- Gerringong
- Nowra
- St Georges Basin
- Jervis Bay
- Sussex Inlet
- Mollymook
- Ulladulla
- Batemans Bay
Southern Highlands
We are proudly based in the Southern Highlands and test throughout the region and surrounding areas, including:
- Bowral
- Mittagong
- Moss Vale
- Burradoo
- Berrima
- Robertson
- Exeter
- Bundanoon
- Sutton Forest
- Bargo
- Tahmoor
- Picton
Southern Tablelands & ACT
We make regular trips to the ACT to test throughout Canberra and the surrounding region, including:
- Goulburn
- Crookwell
- Queanbeyan
- Canberra
- Jerrabomberra
- Googong
- Tuggeranong
- Belconnen
- Gungahlin
- Cooma
- Jindabyne
- Thredbo
Hundreds of 5-Star Reviews
Customer service matters to us.
We pride ourselves on clear communication, punctual service and long-term support. Our commitment to quality is reflected in our hundreds of 5-star reviews.
When you choose Fresh Ventilation, you are choosing a company that stands behind its work.
Frequently Asked Questions
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.
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