Heat, Cool & Power Your Home — Off-Grid.

Yes — the Vault is all three books in one purchase. You get Vol I (The Heat Files), Vol II (The Cooling Code), and the bundle-exclusive Vol III (The Free Power Files), delivered together instantly. If you buy the Vault, do not buy the individual volumes as well — you'd be paying twice for the same books.

Yes. Every order from this page delivers the latest edition, updated July 17th with 3 brand-new chapters — included free, no subscription, no extra fees. Once you have the files, they're yours forever.

Most methods work universally, but some depend on your site and climate — and the books tell you honestly which ones. Cooling methods like earth tubes and evaporative coolers shine in dry and temperate climates; power methods like solar work anywhere, while micro-hydro needs a stream and wind needs an open site. Every volume includes regional playbooks so you know exactly which builds fit your home and which to skip. We never promise a method works everywhere when it doesn't.

It depends on which builds you start with. Quick wins like the attic radiant barrier and night-flush cooling show up on your next billing cycle — typically 28–35 days. Bigger builds like the earth tube or a thermoelectric power setup take a weekend to build and then save continuously. The books give honest numbers so you know what to expect.

Many methods work for renters. You can't dig an earth tube or cut into a roof, but external shade, night-flush cooling, portable solar, and a battery power station all work in a unit you don't own and move with you. Each volume flags which methods need a yard or roof and which work anywhere, so renters and apartment dwellers can focus on the builds that actually apply.

Yes. Many of the builds are light bench work — wiring a thermoelectric module, assembling a solar-and-battery setup, building a passive cooling tower. The heavier jobs can be hired out to a local handyman for a few hundred dollars and still pay back quickly. The books flag which builds require physical work and which don't, so you can plan around what fits you.

All three volumes are delivered as downloadable PDFs immediately after purchase. You can read them on any device — phone, tablet, computer — or print them for use during builds. There are no monthly fees, no subscriptions, no app required. Once you have the files, they're yours forever.

7-day money-back guarantee on every purchase. If the content doesn't meet your expectations within the first week, you get a full refund — no questions asked.