ThermaVault
Built by techs, for techs & students

The HVAC guides that actually make it click.

Clear, accurate, no-filler PDF guides covering the whole trade — from your first day learning the refrigeration cycle to charging by superheat on a live call. Every guide is 50+ pages and priced so a student can afford the whole library.

Browse all 18 guides → Get the full library
✓ Instant PDF download ✓ 50–90 pages each ✓ Works on any device

// Why buyers stick around

Guides in the library18 titles
Price range per guideFrom $12
Skill levels coveredBeginner → Pro
Repeated filler content0%
Full-library bundle$79 (–69%)
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50+ pages, every guide

Complete coverage of one topic — not a thin checklist padded with fluff.

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Accurate, field-tested

Written in plain English the way it's done on real equipment, not theory soup.

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Student-friendly pricing

Guides start at $12. Buy one topic at a time or grab the whole vault.

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Instant download

Buy, download the PDF, and start reading on your phone in the truck or at school.

// The Library

18 guides. No two cover the same ground.

Each title goes deep on one piece of the trade so you're not paying twice for the same information. Filter by where you are right now.

// Best value

The Complete ThermaVault Library

All 18 guides — over 900 pages covering fundamentals, electrical, diagnostics, systems, install, certification and the business side. The fastest, cheapest way to go from zero to confident.

One download. Every guide. Lifetime access to the files.

$257 if bought separately
$79
Save $178 — 69% off Get the full library →
// Before you buy

Frequently asked questions

How do I get my guide after I pay?+
It's an instant digital download. The moment your payment goes through, you get a download link for the PDF and a copy by email — no waiting and nothing shipped. You can open it right away on your phone, tablet, or computer.
Are these good for a complete beginner, or only working techs?+
Both. The library is ordered from the ground up: titles like HVAC Fundamentals and The Refrigeration Cycle, Step by Step assume zero experience, while diagnostics, charging, and commercial guides go deep enough to be useful to working technicians. The level badge on each card tells you exactly who it's written for.
What format are the guides in?+
Every guide is a clean, printable PDF that opens on any device — phone, tablet, laptop, or printed out for the shop. No app, login, or special software needed. Read them in the truck, in class, or at the kitchen table.
Do I need any prior knowledge or special tools to use them?+
No prior knowledge for the beginner guides — they start with the absolute basics and build up. The guides also explain which tools (multimeter, manifold gauges, vacuum pump, etc.) a step requires, so you'll know what to grab before you ever touch a unit.
What makes these different from free videos and forum posts?+
Free content is scattered, often wrong, and rarely teaches a topic start to finish. These are structured, accurate, 50+ page references you can search and re-read — written in one consistent voice with no repeated filler, so each guide earns its (small) price.