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Practical notes on NatHERS ratings, blower door testing and building performance in Victoria, written for builders, designers and home owners.

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NatHERS · Blower door

Is your new home really under 10 ACH? Why a blower door test matters for your NatHERS rating

The NCC’s 10 ACH50 airtightness benchmark, what CSIRO found when new Australian homes were tested, and how a measured blower door result can be used in a non-regulatory NatHERS re-rate in HERO.

5 October 2026 · 9 min readRead article →

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