Boiler Fundamentals: How Your Heating System Works

A complete guide to how gas boilers and central heating systems work — from the heat exchanger to the radiator circuit. Covers combi and system boilers, fault finding, pressure management, and what an annual service includes. Written by a Gas Safe registered engineer.

What's included

✓5 text-based lessons with diagrams
✓10-question quiz to test your knowledge
✓Certificate card when you score 80%+
✓Lifetime access — read at your own pace
✓No videos, no subscription — one-time purchase

Free preview — Lesson 1

Inside a Gas Boiler: How It Produces Heat

A modern gas boiler is essentially a controlled explosion inside a sealed box. Understanding the basic process helps you diagnose faults and communicate clearly with engineers.

Purchase the course to read the full lesson and 4 more.

Course contents

1Inside a Gas Boiler: How It Produces Heat🔒

2Combi Boilers vs System Boilers🔒

3The Central Heating Circuit🔒

4Boiler Pressure: Understanding the Gauge🔒

5What Happens During an Annual Boiler Service🔒

🎓End-of-course quiz (10 questions)🔒

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Coming soon— this course is not yet available for purchase. We're adding the final content and it will be live shortly.

£19.99one-time

Secure payment via Stripe. Lifetime access on purchase.