What is Hydronics?

Understand the foundation of modern heating systems

Hydronics is the use of water to move heat around a closed system of pipes and emitters.

Good hydronic design ensures the movement of water and heat is carefully controlled to maximise heat source efficiency, whether you’re working with gas, oil or heat pumps.

Why hydronics matters today

Older systems ran at lower, fixed efficiencies, so design had less impact. 

Modern boilers and heat pumps can run far more efficiently, but only when the system is designed and set up correctly.

Without proper control of flow rate, resistance and temperature, even the best boilers and heat pumps won’t perform, reducing comfort, increasing running costs and creating avoidable problems you'll have to return to.

That means good hydronic design is no longer optional. 

One skill, across every system

Hydronics is the common foundation across all wet heating systems. 

Learn it once and you're set for all technologies and scenarios:

• Gas and oil boilers
• Low temperature systems
• Heat pumps

How do you learn hydronics?

For many heating engineers, hydronics hasn’t been part of formal training. Traditional gas and oil routes have focused more on appliances than systems and even modern apprenticeships often only touch on it lightly.

As a result, much of the real learning has come from the ground up through peer-to-peer knowledge sharing and grassroots-led training courses, including that run by Warmur Academy co-founder Kimbo Betty. 

As industry and regulation moves towards lower temperatures for boilers and heat pumps, the importance of hydronics is becoming more widely understood. However, feedback suggests many existing courses still focus heavily on theory, making it difficult to apply on site.

A more practical way to learn

At Warmur Academy, we take a different approach.

We teach hydronic design the way engineers actually work, giving you a game plan to approach every job.

Built around our 10-step approach, learning follows the order you work, from start to finish, introducing the theory at the point you need it to make the right decisions.

From heat loss to pump setting, the focus is on practical methods you can use on site straight away, not just the theory behind them.

Is it mandatory?

Part L of the Building Regulations already requires a full new system to operate at low flow temperatures (55°C or below), which means designing the pipes and emitters to run at this temperature.

System skills will eventually become formalised across standards, training and certification schemes, to support building regulation compliance.

Right now, most heating engineers develop these skills because they see the benefits to their business and because technical expertise is a big part of their job satisfaction..

Need to know more?

Discover our Hydronics Unlocked Training Programme

Ready to start?

Join a 1-day masterclass 

Explore our upcoming online course

Got a question?

Get in touch with our team at hello@warmuracademy.co.uk