Powerhaus is the first DIY interface for NatHERS — and the first Australian tool to combine insulation, airtightness, solar and systems into one live, holistic energy efficiency dashboard.

It’s built for architects. The ones who care about performance so much they train as NatHERS assessors or Passive House consultants — just to get clear answers. Even then, it’s hard to bring clients along for the ride. The tools are complex. The feedback is slow. The insight often comes too late.

Powerhaus changes that. It brings clarity to the front end of design — when decisions are still flexible and impact is highest.

The app gives instant, visual feedback on how specifications, systems and layout interact. Users can test insulation, glazing, airtightness, heating and cooling choices, and solar sizing — and immediately see the effects on energy use and cost in real-world units, not abstract stars.

It makes complex building physics accessible. You don’t have to be a scientist to understand the trade-offs. Powerhaus empowers smart, performance-based decisions that align with Passive House principles and solar passive design — without the friction.

Powerhaus doesn’t replace materials. It helps you use them better. By making performance legible during design, it avoids unnecessary over-specification, reduces cost risk, and ensures every sustainability choice is doing real work.

This isn’t another calculator. It’s a performance engine — built by practitioners, for practitioners — that puts energy outcomes back in the hands of the people shaping buildings.

It helps you answer client questions, test ideas in seconds, and make confident, sustainable decisions — before they’re locked in.

Powerhaus makes energy design visible. Practical. And finally, easy to act on.