Articles
Practical notes on NatHERS ratings, blower door testing and building performance in Victoria, written for builders, designers and home owners.
Published
How community housing providers can prioritise energy efficiency upgrades
A practical way to rank Victorian community housing stock for energy upgrades — using performance evidence, renter need and upgrade potential, not guesswork.
Read article →NatHERS · Blower doorIs 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.
Read article →NatHERS · ApartmentsGreat Design Fast Track: hitting the NatHERS targets without wrecking the design
What GDFT requires for apartments and townhouses, why the NatHERS bar sits above ordinary compliance, and how early modelling in HERO keeps the design on track.
Read article →Rental energy efficiencyVictoria’s rental minimum energy efficiency standards: a landlord checklist
What the new minimum standards cover from 1 March 2027, when each rule kicks in, and how to check a rental before you renew the lease.
Read article →Being written
Next on the list. These will be published here as they are finished.
What to send us for a clean 7-star and Whole of Home run in HERO
A checklist of drawings and specifications that avoids back-and-forth and gets your rating done first time.
Essential vs Preferred vs Verified: which package suits your project
How the three NatHERS packages differ, and which one fits a standard build, a tricky design or a verified handover.
Moving across from the current site
These articles are on the current geokal.com.au and will be refreshed and moved here, with the old links redirected.
Energy rating & blower door testing costs
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