Boiler Smarts: Lower The Temp, Save Your Sanity!

June 23, 2025July 2, 2025 Finn Bark

Some of you can probably increase your condensing boiler efficiency by lowering the flow temperature

Personal Hook

I still remember when my roommate, Alex, and I first moved into our new place. We were so excited to finally have a proper kitchen that we decided to cook a big Sunday roast for dinner. Little did we know that our old boiler would give us quite the surprise – it started making this weird rattling noise and suddenly stopped working! We were left standing in front of a cold stove, wondering what hit us.

The Realization

Fast forward to when I finally mustered up the courage to ask Alex (the self-proclaimed DIY master) to take a look at our boiler. After some tinkering, he realized that we had been running the central heating at an unnecessarily high temperature. Who knew? Turns out, it was just one of those everyday hacks that our previous landlords never bothered to tell us about.

The Hack

So here’s the thing: if you have a condensing boiler, try turning down the central heating flow temperature as low as 50 °C (that’s like, super chilly!). This simple trick can increase your boiler’s efficiency by a whopping 4-5%! Now, I know what you’re thinking – “That’s not exactly a game-changer.” But trust me, it adds up over time. Plus, think of all the extra cups of coffee you could buy with that saved energy.

Funny Fail Moment

Let’s just say Alex’s DIY magic didn’t quite translate to fixing our boiler on the first try… He managed to turn off the whole house’s electricity while trying to replace a simple fuse. Long story short, we had to wait for the electrician to arrive and “magically” fix everything (read: not exactly a hack we’d recommend).

Reflection

After making this tiny change, our energy bills actually went down! It was like having a little secret that only us knew – until now, when I’m sharing it with you, of course. Just remember, small tweaks can make all the difference in the long run.