Passive Design: Build Without AC
Comfort should not need a plug.
Great design cools for free.
Buildings kept people comfortable for centuries before air conditioning existed. Rediscover the timeless techniques that cool, warm, and ventilate naturally, and put them to work in modern design.
The buildings you design will stay cool without AC.
- Harness natural cooling — move air and shade smartly so spaces stay pleasant without machines
- Learn from tradition — borrow proven wisdom from buildings that predate modern systems
- Orient with intention — position and shape buildings to make the climate do the work
- Slash running costs — design comfort that does not show up on the electricity bill
- Apply it anywhere — adapt passive principles to homes, offices, and everything between
- Convince the skeptics — show clients that comfort without machinery genuinely works
Built by one of the most-read architecture platforms in the world.
RTF | Rethinking The Future has spent over a decade publishing the ideas, projects and voices shaping architecture — and now brings that depth to learning. Every course is researched, written and produced by the RTF team.
The best cooling system is good design.
A clear path. Eight steps.
Everything unlocks instantly with membership · learn at your own pace
If you see yourself here, start today.
A few hours from now, you could already see differently.
Air conditioning felt like the default answer to every comfort problem I faced. The passive strategies here are old wisdom explained with real numbers. I have since designed a small house that stays comfortable through summer with no mechanical cooling.
Simple by design.
Watch
Short, focused video lessons — each one a single idea, clearly explained.
Apply
End every lesson with a small task that pushes your real project forward.
Transform
Watch your work develop a point of view that is unmistakably yours.
Answered simply.
Can passive design really work in extreme heat?
Passive strategies won't abolish every air conditioner, but they can dramatically shrink dependence on it — and you'll learn exactly which levers matter in hot climates.
Is this too basic if I studied climatology in school?
School gives you the physics; this gives you the design moves. If you can't yet turn theory into building form, it's not too basic.
Do I need any prior experience?
No. Every course starts from where you are and builds up step by step, in plain language.
Is this software training?
No — software changes yearly. The thinking you learn here lasts a career.
How does it work?
Short video lessons with a small practice task after each. Any device, your pace.
What does membership include?
One membership unlocks every course on RTF Academy — all 450+, nothing sold separately. And you stay in control: cancel anytime in one click, and you will never be charged again.
Ready to see your work change?
Your next project could be the one that feels truly yours.
- 8 Sections
- 25 Lessons
- 4 Hours
- Introduction to Passive Design3
- Climate Understanding3
- Site Planning & Orientation3
- Natural Ventilation Strategies3
- Building Envelope Design3
- Daylighting & Shading3
- Materials & Sustainable Choices3
- Passive Design Applications4
Reviews
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Air conditioning felt like the default answer to every comfort problem I faced. The passive strategies here are old wisdom explained with real numbers. I have since designed a small house that stays comfortable through summer with no mechanical cooling.
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