Can you apply passive house principles
within our budget?
Yes, but not as a lighter version of certified Passive House. Here is the honest difference between the two paths, and why we don’t sell a middle ground that skips certification to save money.
The short answer: yes, but not as a lighter version of certified Passive House.
Passive house performance is not a spectrum you can dial down to save money. Full PHI certification requires meeting the 0.6 ACH airtightness standard and the primary energy demand threshold, verified by an independent third party, and if that level of performance is genuinely what you want, certification is how it gets proven rather than assumed. If Passive House was never the goal, we build a genuinely good, honestly distinct high-performance custom home instead, on its own terms, not as a discount approximation of one.
Two honest options, not a sliding scale.
Full PHI certification
If passive is the goal0.6 ACH blower-door tested. PHPP modelled through construction. Independently certified by a third party. The only way Passive House-level performance is proven, not assumed.
High-performance custom
A distinct tierContinuous insulation, double glazing, mechanical ventilation, built to Marvel's own high standard. Not aimed at Passive House performance at all, so no PHPP model, no blower-door target, and no PHI certificate.
NCC 7-star + upgrades
MinimumMeeting the 7-star NatHERS compliance minimum with targeted upgrades to insulation or glazing. The most cost-effective starting point, but the performance gap with full passive house is significant.
Our honest position.
We do not sell “almost Passive House” as a way to save money. If Passive House-level performance is genuinely what you’re after, we build and certify to the full PHI standard: the independent review and blower-door testing through construction are what make that promise real, and the cost (0.5 to 0.8% of construction) is trivial next to the risk of an unverified claim. If the budget is tight and passive performance is the goal, we talk about scope before we would ever talk about quietly dropping certification. If Passive House was never the goal for your project, our high-performance custom tier is a genuinely good, honestly different product in its own right, not a discount version of one.
The Passive House Institute publishes certification criteria for Classic, Plus, and Premium levels. The Australian Passivhaus Association provides Australian-specific guidance.
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