A combi boiler controls the water temperature on your heating system and scorching water. It’s the central hub that determines how scorching the water being pumped to your radiators and faucets is. So it is smart that it is arrange to make sure that you get the suitable warmth output and your scorching water is on the ultimate temperature.
The combi boiler is likely one of the most typical sorts of boiler present in properties, and happily, they’re straightforward to function. Most will function simple-to-access controls for warmth and water, permitting you to set the temperature. The bottom line is to regulate the temperatures to swimsuit the present circumstances. Right here you’ll discover skilled recommendation on what these must be and when to vary them to attain most effectivity and save in your vitality payments.

Patrick Garner is a seasoned Fuel Secure licensed engineer and the devoted chief of the heating system installations workforce at Heatable, with intensive expertise in boilers, warmth pumps and residential vitality options.
Why combi boiler water temperature is vital
You could not suppose that the water temperature on a combi boiler is that vital, however it’s, as Patrick Garner, Fuel Secure Engineer at Heatable, rapidly explains, “Getting the temperature proper is vital for consolation, security, and effectivity.” He provides, “Too scorching and also you threat scalding; too cool, and there’s a threat of micro organism comparable to Legionella.”
Louis Georgiou, Operations Director at Important Workwear, provides, “In case your boiler is ready too excessive, it really works more durable than it must, which might shorten its life and waste vitality. Retaining it on the proper degree helps the boiler run easily and reduces pressure on the system.”

Louis Georgiou is Operations Director at Important Workwear, bringing hands-on expertise throughout manufacturing and logistics to the world of development and DIY.
Strive these to understand the suitable combi boiler water temperature
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Luxurious Fashionable Slipper Bathtub
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Optimum water temperature for heating and scorching water
The optimum temperature will not be set in stone; the temperature usually varies for decent water and heating. Garner factors out, “For decent water faucets and showers, round 50 to 55 levels Celsius is about proper.” He provides, “For heating, 65 to 70 levels is the norm in winter, however you’ll be able to flip it down in summer time whenever you don’t want the radiators operating.”
Georgiou provides, “Round 50–55°C is scorching sufficient for consolation and hygiene with out placing the boiler beneath pointless stress. Baths is usually a bit cooler for those who desire, since you’re sitting within the water for longer, and excessive warmth can really feel uncomfortable.”
Georgiou finishes with some wise recommendation for decent water temperatures, “The best solution to deal with temperature is to set your boiler at an ordinary temperature after which use mixer valves on faucets and showers to fine-tune for every use. That approach the boiler isn’t consistently being adjusted, and you continue to get the flexibleness to decide on what feels proper.”
It’s value noting that for those who add any new type of set up to your house, comparable to cavity wall insulation or new home windows and doorways, chances are you’ll not want the identical warmth output from the radiators. This implies you’ll be able to flip down the heating output by round 5 levels.
Advantages of turning down the temperature
You may management the temperature on a combi boiler by merely working the controls usually discovered on the entrance of the boiler. There might be one for the new water and one for the heating. This may often be set individually.
Garner says, “Decreasing the temperature even by a few levels can get monetary savings as a result of the boiler spends extra time in its most effective condensing mode.” This level is bolstered by the heating engineer who involves service my combi boiler.
He recommended that I flip each the water and heating by 5 levels (water now at 50 levels and heating at 62 levels) to see if I may discover the distinction. He additionally talked about that water shouldn’t go under 50 levels to forestall micro organism from forming. His last piece of recommendation was to show up the temperatures within the colder months if wanted, however don’t overlook to show down when the climate warms up.
Turning down the temperature to an optimum temperature can also be good for the boiler itself. It means it received’t be in motion so typically, leading to much less put on and tear on the interior elements.
Different methods to optimise your combi boiler
Right here are some things you are able to do to regulate the temperature within the dwelling.
1. Use a TRV
Most fashionable combi boiler powered central heating programs will embody a TRV (Thermostatic Radiator Valve) on a radiator. If you don’t at the moment have TRVs in your radiators, I like to recommend you get them fitted. This helps management the temperature from room to room, making it a extra environment friendly and finally money-saving heating system.
2. Decrease bed room temperatures
Modify your radiator valve in order that the temperature in a bed room is barely decrease (1-2 levels) than the principle residing areas. This helps get monetary savings and offers optimum sleeping circumstances.
3. Set your thermostat
Most central heating thermostats have a timer. Use this to show down the warmth at evening and lift it for whenever you rise up within the morning. If nobody is at dwelling through the day, you’ll be able to decrease the temperature for these hours and set the timer to modify on the heating half an hour earlier than you get dwelling.
FAQs
Is operating a combi boiler at most temperature a good choice?
There isn’t a actual profit to operating a combi at most temperature, as Garner shares, “Operating a boiler flat out on a regular basis not solely wastes vitality however may also shorten its lifespan.”
He provides, “A greater strategy is to set it simply excessive sufficient to be comfy. In summer time, many households flip the heating circulation temperature proper down or off, whereas preserving scorching water at round fifty to fifty-five levels.”
You may flip up the temperature on a combi to most if circumstances dictate, comparable to throughout a very chilly winter or whenever you want hotter water. Nonetheless, it is smart to show again to your customary temperature setting as quickly as doable.
If you happen to don’t keep it, your vitality payments might be increased, and the boiler must work more durable than it ought to, resulting in extra breakdowns and the necessity for substitute components.
How vital is common boiler upkeep?
Essential. You don’t need boiler issues, particularly in the midst of winter, so you want to hold your boiler usually maintained. Frequent apply is to get an annual service, which usually features a visible verify, inner inspection, and cleansing of filters, comparable to a rust filter, to make sure all the pieces is operating as anticipated.
An annual service will price round £80-£100 and also will assist be certain that any warranties are nonetheless legitimate. If you happen to don’t get an annual service, it could actually void the guarantee that comes with the boiler.
Getting your scorching water temperature proper is essential for a heat bathtub or bathe, as is designing your area to completely benefit from the expertise. Take a look at our fashionable lavatory concepts, lavatory sink concepts and small bathe room concepts for inspiration and new concepts.

