The complete honest system · Second Edition

The cool was always there. The meter just started doing your thinking.

Before cheap electricity, American houses were cooled by shade, night air, and knowing the house — for pennies. The Passive Cooling Vault is that system restored: every method with its real cost, its honest savings, and the climate where it loses.

Get the Vault — $57 Read the math ↓

68 pages Every method worth owning “Where it loses” in every chapter 30-day refund

The Passive Cooling Vault — Second Edition cover

Built from real
owner reports

The thing nobody told you

Your house isn’t bad at staying cool. It was built assuming electricity would stay cheap.

Most of a summer bill is heat that never needed to enter — sun through unshaded west glass, a 120–160°F attic radiating down through the ceiling all evening, cool morning air spent by ten o’clock because nobody sealed it in. Every one of those has an old, cheap, working answer.

It’s not a conspiracy that you’ve never heard them. It’s just that the answer is usually a $10 pair of thermometers, a $30 box fan, or a Saturday with a caulk gun — and nobody can build a business on telling you that. The fan aisle sells machines. The service truck sells visits. This book sells the knowing, once.

Read the math

A summer of cooling, the way most households pay it.

Typical mid-2026 U.S. figures — conditioned ranges, not promises. Check them against your own bill; the book shows you exactly how.

Summer Cooling — What It CostsSTATEMENT · JUN–SEP

Central AC compressor hours, June–SeptemberAt roughly 50¢/hour for most households — much of it fighting the attic and the glass.

$400–800

One HVAC service callOften for a machine that was besieged, not broken.

$150–300

The fan bought on a guessThe wrong machine for the climate — the $400 mistake this book exists to prevent.

$100–450

A roof aging early under a 150°F atticRoofers will tell you: attic heat kills twenty-year shingles at twelve.

real, every year

What the heat costs you, per summer≈ $650–1,500 · every year

The Vault — one time, yours forever$57

The book’s meter-reading page shows you how to verify your own numbers against your utility bill — kWh per cooling-degree-day, the honest way.

What’s inside

Nine parts. A ten-minute profile routes them to your house.

A Gulf Coast bungalow and a Denver foursquare need almost opposite playbooks — so the Vault opens with a House Profile, and every route ends at a machine, a build, or a habit with a dollar figure on it.

PART 0 — YOUR HOUSE PROFILEp. 4

Six questions and a reading map. The book reads itself in the right order for your climate, your attic, your budget year.

PART 2 — THE ATTIC WARp. 10

The oven over your ceiling: the leaky-ceiling test that decides which fan is safe, the turbine / powered / solar adjudication, and the no-fan answer nobody sells.

PART 3 — THE WHOLE-HOUSE METHODp. 18

The machine that cooled America before compressors — the $30 one-evening proof, the $50 hatch build, real sizing math, the safety rules with no exceptions.

PART 5 — THE EARTH TUBE, HONESTLYp. 31

The famous $300 build with its true all-in bill printed in its own correction box — three gates, twelve steps, and who shouldn’t build one at all.

PART 7 — HELP YOUR ACp. 39

Condenser shade done right (and the wrong way that wrecks it), the $20 coil ritual, duct sealing, and the temperature test that settles “broken machine or besieged house.”

PART 8 — THE SYSTEMp. 49

The two-fan relay, the owner’s twelve-month calendar, battle plans for all three climate countries, and the First 48 Hours protocol for the week the AC dies.

Plus the complete 28-method Cooling Code as adjudication cards, the shade math, the roof chapter, the Honest Ledger, the $100 / $500 / $2,000 budget paths, the room-by-room planner, and the meter-reading page.

Look inside

Real pages from the real book.

No blurry mockups — these are pages 3, 27, and 58 of the file you’ll download.

Contents page of the Vault — The map of the book

Method adjudication cards — Adjudication cards — the window war

The Honest Ledger master table — The Honest Ledger — every method, one table

Set in the same cream-and-barn-red the films run — because it’s the same research.

The offer

Everything, for less than one service call.

The Passive Cooling Vault — Second Edition68-page PDF · nine parts · every method with real costs and honest limits

the book

The Earth Tube Build Files — absorbedThe complete build: gates, twelve steps, bill of materials, the true all-in cost

sold alone at $19

The 28-Method Cooling Code — absorbedEvery method as an adjudication card: cost, honest cut, where it loses

sold alone at $37

The planner, the calendar & the First 48 Hours protocolThe room-by-room planner, the owner’s twelve months, the AC-died emergency list

new in this edition

Every future edition, freeIncluding the corrections — this edition already prints one the first edition owed you

forever

You pay once, today$57

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The rules this channel runs on

Every chapter ends with “Where It Loses.”

“Nothing in home cooling works everywhere — and nobody selling fans writes that section. So this book leads with it.”

Savings are printed as conditioned ranges from DOE guidance, published measurements, and hundreds of owner reports from the films’ comment sections — never as promises. Where the first edition priced a build too kindly, this edition prints the correction and says so, in its own box, on the page.

The method	Where it loses — printed in the book
The whole-house fan	Muggy climates. If your evenings fail the test, the book tells you not to buy it.
The powered attic fan	Leaky ceilings — where it quietly raises the bill. The test comes first.
The $300 earth tube	Wet ground, humid climates — and the “$300” itself gets corrected to the true all-in bill.
The swamp cooler	The entire humid half of the map. The book draws the line on it.

The field reports inside

Built with the owners, not just for them.

Hundreds of homeowner reports from the films’ comment sections shaped this edition — these three are in the book, with the lessons they taught.

“Fan on for the dry evenings, off when the air turns to soup — and the machine waits.”

The Arkansas humidity manual · Part 3

A whole-house machine installed in the seventies, still pulling the evening through the house on its fiftieth summer.

The Missouri machine · Part 3

A $50 hatch-mounted build with a homemade insulation lid every November — the winter rule, solved for two dollars of foam board.

The Chicago build · Parts 3 & 8

Fair questions

Before you ask.

Is this just the YouTube videos written down?

The films argue single cases; the Vault is the system — the profile that routes it, the sizing math, the builds, the ledger, the calendar, and the “where it loses” sections for every method, including the ones no film covers.

Will this work in my humid climate?

Parts of it — and the book is blunt about which parts. Your route skips the whole-house fan and runs the attic war, the window war, and the help-your-AC chapter instead. If a method fails in your climate, the book says so before you spend.

Am I handy enough for this?

The $100 path needs a caulk gun and a Saturday. The bigger builds say plainly which single hour belongs to an electrician or a roofer — and where a job needs a licensed professional, the book tells you to call one. That honesty is the whole brand.

I already bought a single volume earlier.

Then the full Second Edition Vault is yours free — check the email on your purchase, or reply to any message from the channel and we’ll send it.

What do I actually get, and how do I read it?

A 68-page PDF, delivered instantly by Gumroad. It opens on your phone, tablet, or computer, and you can print any page — the log sheets and checklists are built for it. No app, no account, no subscription. Every future edition is free.

What if it’s not for me?

Reply to any email within 30 days and we refund it without argument — keep the book. Same honesty the films run on.