Since 2005, condensing technology has become increasingly popular, offering homeowners a space- and energy-efficient option. 80% of UK households have opted for combi boilers to save money on electricity bills. Still, they may not realise that if the boiler flow temperature setting is not correctly adjusted, it will not run as efficiently as it should.
This helpful article will provide valuable information on combi boiler flow rate, including how to set the right temperature and other essential tips to ensure your boiler runs smoothly and efficiently. By following these guidelines, you can save money on energy bills while keeping your home warm and comfortable during the colder months.
What is the boiler flow temperature, and how does it work?
The combi boiler flow temperature ensures your heating system functions efficiently and effectively. It refers to the temperature at which your boiler heats the water and circulates it to your taps, showers, and radiators.
Keeping your boiler’s flow temperature within the recommended range is important to avoid problems. Too high a temperature can cause overheating, pump damage, and reduced energy efficiency. Vice versa, too low a temperature can cause inconsistent heating output and increased fuel consumption, leading to poor performance.
It depends on several factors if you are wondering about the ideal temperature range for the boiler flow. These factors include the type of fuel you use, weather conditions in your region, heating load requirements, and the features and design of your boiler.
Although nowadays, advanced boilers come with control panels that regulate and monitor the boiler’s flow rate, maintaining a consistent temperature throughout your home. Proper maintenance and adjustment of the boiler flow temperature are essential for improving efficiency, prolonging system life expectancy, reducing energy costs, and ensuring comfort levels for residents.
Does the ideal flow temperature depend upon the type of boiler?
To optimise the efficiency of your boiler’s flow temperature, investing in a condensing combi boiler is imperative. This type of boiler eliminates the need for a hot water storage tank and provides hot water on demand, making it a highly convenient and cost-effective option.
If you currently have a system or a heat-only boiler, avoid adjusting the flow temperature independently. Instead, seek the assistance of a qualified professional who will assess your system. But still, if you want to lower the temperature, don’t lower it below 65°C.
What temperature should a combi boiler be set at?
Determining the optimum temperature to set on a combi gas boiler is crucial for maximising efficiency and reducing energy bills. Initially, most gas boilers are set up with a flow and return temperature of 80°C–60°C. To clarify your concept, the flow rate refers to the temperature at which the water gets heated. On the other hand, the return rate is the temperature at which the water travels back to the boiler after providing heat to the radiators.
It is important to note that the initial settings mentioned above are generally too high and limit the effectiveness of your boiler’s condensing technology. So, it is suggested to lower the flow temperature from 80°C–60°C to 60°C–70°C. Lower temperatures will maximise the condensation in your boiler, resulting in efficient heating and lower energy bills.
When showering, remember that setting the temperature below 50°C can increase the risk of legionnaires disease. To avoid the risk, it is suggested to set the temperature between 37°C and 38°C.
Another factor that affects your boiler’s flow temperature is your home’s insulation. If your home is properly insulated, the flow temperature should be set to 50°C. However, if you are unsure about your home’s insulation, it is suggested that you contact an expert to let them inspect it and go with his recommended temperature ratings.
After taking care of all the considerations mentioned above, it is suggested to lower the flow temperature by 5°C–10°C from the initial setting, but not more than that, regardless of how well-insulated your home is.
How to turn down the flow temperature on a boiler?
Lowering the flow setting of your boiler is a simple task that can be accomplished by accessing the control buttons in front of it. However, it’s important to note that the control settings may vary depending on the make and model of your boiler. Let’s explore the different control settings available:
- Most combi boilers have two dials, one for heating and one for hot water. A radiator icon usually represents the heating dial. To adjust the temperature and make your home cosy, simply push the radiator icon button and set the temperature to your desired level.
- Some Worcester boilers have settings ranging from 1 to 6 and do not provide an actual temperature setting. In this case, you will need to adjust the setting manually. Suppose your boiler is set to number one with a digital screen displaying 80°C. Then setting the number to three will give you 60 °C.
- Other boilers come with both dials and a digital display screen. Each dial will consist of symbols for the water tap and radiator. To lower the temperature, simply turn down the radiator dial.
- Newer boilers come with a digital display screen and up and down buttons. Adjusting the temperature is as easy as pushing the up and down, or + and -, buttons.
By following these simple steps, you can quickly lower the flow setting of your boiler and enjoy a comfortable home environment.
Ideal temperature rating month by month
|Month||Old Home||Modern well-insulated home|
|January-February||60°C – 65°C||50°C – 55°C|
Is it necessary to lower the boiler flow temperature?
While not strictly necessary, lowering the flow temperature on your combi boiler is considered good practise to reduce energy usage without turning down your thermostat.
It is important to note that this may not be suitable for everyone, as a lower flow temperature may not provide sufficient warmth.
In some cases, a higher flow temperature may be more appropriate, particularly if your home is susceptible to getting cold. Adjusting your flow temperature should be based on your needs and circumstances.
After reading this article, we hope you have better understood the combi boiler flow rate and the ideal temperature settings for heating.
Comprehending the boiler flow temperature is crucial, as incorrect settings can lead to underutilisation of your combi boiler and central heating system. Although we have suggested lowering the boiler flow temperature settings, it might not be suitable for everyone. Therefore, I suggest conducting some trial and error so that you can determine the ideal temperature for your home.
If you have a system or heat-only boiler, it is best to leave the boiler flow unchanged and seek professional assistance. If you still have any questions regarding your boiler, please do not hesitate to contact us at 0345 3192 247 or visit our website.