How Central Heating Controls Really Changed

When I left school at 15 to start my apprenticeship, most homes in Britain were still heated by coal. Central heating was the new thing — and my dad, a plumber himself, pushed me into it because he knew a trade would set me up for life. He was right.

What followed was a five-year apprenticeship, then over 50 years working as a Gas Safe registered central heating and plumbing engineer — including my own company, Duval Heating. Along the way I watched this industry change almost beyond recognition, especially when it comes to the controls that run our heating systems today.

Here's what 50 years on the tools actually taught me.

The Early Days: No Corgi, No Internet, Just Word of Mouth

When I started out, there was no Corgi register, let alone Gas Safe. It was all about reputation. Most work came through word of mouth, and if you wanted to advertise, you placed a small ad in the local paper — that was the internet of the time.

Corgi only came about after the Ronan Point disaster in East London, a gas explosion that blew away one side of a tower block. Registration was voluntary at first. Engineers signed up because it brought in work, not because the law demanded it. You had to show three completed gas jobs, sent in by post, before they'd even consider you.

It wasn't until years later that registration became compulsory — and even then, you were only qualified for the specific appliances you'd been examined on. Boilers were separate from fires, which were separate from cookers. LPG was an entirely different set of exams again, even though the gases behave similarly. That structure hasn't really changed today.

From Floor-Standing Boilers to Wall-Mounted, and Everyone Wanted One

The first boilers I installed were big floor-standing units. When wall-mounted boilers arrived, it didn't matter whether a customer's home actually suited one — everybody wanted to swap. That pattern repeated itself constantly throughout my career: a new product arrives, and demand follows regardless of whether it's the right fit for the property.

Combi boilers were the same story. The moment they appeared, customers wanted one fitted, whether or not it actually suited their hot water demands. Part of my job was always talking people through whether what they wanted was actually what they needed.

The Arrival of Smart Controls

Around 1998, the government started pushing energy efficiency hard, and that's when heating controls really began to evolve. The first wireless controls felt like luxury items — customers had them fitted partly to show off to family and friends, not just for the energy savings.

That novelty factor never really went away. Smart thermostats today are, in some ways, the heating industry's version of a new phone or laptop. People want the latest version because it's the latest version — not always because they understand what it does or whether it suits their system.

That's where problems start. I can't tell you how many service calls I went on where the fault was something simple: a wire in the wrong place, or a switch accidentally turned off. But I've also seen control units damaged because the wrong product was connected to the wrong wiring setup. Get it wrong with a smart control, and you can blow a circuit board. Many retailers won't take a smart thermostat back once it's been wired in, even if it turns out to be the wrong choice for your boiler.

What I Learned About Doing the Job Properly

One thing I always insisted on, whether I had 5 engineers working for me or 50: dust sheets, every single job, no exceptions. Clean and tidy makes a happy customer, and around 70% of my work over the years came from recommendations. That's not a coincidence.

I built the company up to over 50 engineers at one point. It sounds impressive, but it became more of a headache than a success — chasing quality control, managing complaints, never quite making the money people assumed I was making. Eventually I scaled right back down to just myself, and it was the best decision I made. Less stress, steady work, and I could guarantee the standard of every job myself.

Why I Started This Site

After 50 years of installing, servicing, and fault-finding on heating systems, I've seen smart controls become a genuinely useful tool for saving energy — but only when they're matched correctly to the property and installed properly.

Now that I'm retired, I want to pass on what I learned the hard way over five decades: which smart controls are actually worth your money, which ones suit which type of boiler and wiring setup, and how to avoid an expensive mistake.

If you have a question about your own heating system, get in touch. I'll do my best to help.