What is Hydronics?

Understand the foundation of modern heating systems

Hydronics is the science of how water flows through a heating system to deliver heat efficiently. It includes the essential components and practices of your trade—like pump selection, DT balancing, low loss headers, radiator sizing, and compensation controls.

It’s the foundation of every wet heating system, whether it’s gas, oil, or heat pump—and yet, it’s often completely missing from modern domestic heating training.

We’re still fitting systems like we did 40 years ago. That’s totally out of sync with condensing boilers and heat pumps—and it’s the root cause of most problems we see in the field.
— Kimbo Betty, Warmur Academy Co-Founder

Why it matters

• Rads hot at one end, stone cold at the other?
• Heat pump constantly cycling but the house never warms up?
• Boiler sounds like a jet engine—but half the rooms stay cold?
• Flow temp set right, but return’s still roasting?
• System balanced—until someone closes a TRV?

That’s not a bad day. That’s bad hydronics.

Understanding how water moves through a system is the difference between a heating system that works—and one that just runs. A solid grasp of hydronic principles will:

• Help you diagnose faster
• Reduce costly call-backs
• Deliver better results to your customers
• Set you apart as a true expert

One skill. Many systems.

Hydronics is the common denominator across all wet heating systems. That means once you learn it, you can apply it everywhere—from gas boilers to low-temp heat pumps.

For engineers currently working in gas, understanding hydronics is the most effective way to prepare for the transition to heat pumps without starting from scratch.

But is it hard?

Not with us.
Our Hydronics Unlocked course breaks down everything into simple, visual, and practical steps that make sense in the real world. You'll learn how to work smarter, install faster, and troubleshoot with confidence.

Need to know more?

Read about our Hydronics Unlocked Programme

Ready to start?

Book onto an in-person kick-off day