Condensing boilers and the boiler thermostat settings

Here at RWM Plumbing and Gas, we are boiler and gas experts. And we provide top quality bathroom, gas and heating solutions to homeowners and property developers around the region, including Chorley and Cottom. As a result, we are often asked for advice regarding the boiler thermostat. In fact, this is one of the things that is the least understood. That’s why, we have produced this guide to everything you should know about condensing boilers and the boiler thermostat settings.

What is the boiler thermostat?

The boiler thermostat controls the temperature the water is heated too, before it is sent around your system. This means that a boiler that is set too low, will simply be passing luke warm or even cold water around your home, and will not warm it up at all. On the other hand, a boiler that is set too high, could be turning most of that water to steam, losing some fuel economy before it has even begun. So if you want to get the most from your boiler, what temperature should the boiler setting be? Well, condensing technology plays a big part in your boiler thermostat settings.

Condensing boilers and the boiler thermostat settings

Condensing boilers can successfully reheat cooler water, when it has returned. This means that they can be up to 90% more efficient than older systems. However, condensing boilers only really extract enough waste heat from the flue, when the water that has returned to the boiler is around 54 to 56 degrees. This means that the water first needs to be heated to around 70 degrees, for it to still be warm enough when returning, after transferring some heat to the radiators and pipes when travelling. A boiler that is set too high or too low will miss out on this fuel saving feature. This means that if you want to get more for your money from a condensing boiler, you should leave your boiler thermostat set to 70 degrees.


Contact the professionals at RWM today, for all your boiler needs, or for more advice about your boiler thermostat temperature.