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Heating

Advice on boilers, radiators, central heating systems and keeping your home warm and energy efficient.

Heating

Heating! Your Questions Answered

After a particularly wet and blustery week, the nation’s fingers are on the heating button, trying to hold off, but desperate to get some warmth into their home.

After a particularly wet and blustery week, the nation’s fingers are on the heating button, trying to hold off, but desperate to get some warmth into their home.

There are usually two types of people: those who crank up the central heating, and those who insist an extra layer and a blanket are equally effective for keeping inhabitants warm.

Is it more efficient to have the heat on long and low?

In most cases, keeping your heating on constantly is not an efficient approach. Instead, it's better to schedule your heating to come on at specific times of the day, such as in the morning (making it slightly easier to drag yourself away from the warmth of your bed) and when you return home from work. However, exceptions exist, particularly in properties susceptible to condensation and dampness. In such cases, maintaining a lower constant temperature during the day can help prevent moisture buildup. If you're working from home and frequently turning the heating on and off, it's advisable to keep the thermostat lower and maintain longer heating cycles, as this reduces the strain on your boiler and minimizes temperature fluctuations.

Will turning the heating up add instant extra heat?

Another common argument between householders is whether turning the thermostat up actually impacts the heat output of the radiators. The simple answer is “no”. Adjusting your thermostat to a higher setting won't make your room warm up any faster; it simply determines the points at which your heating will switch on or off. Raising the thermostat to 25 degrees because you're feeling chilly won't provide immediate relief; instead, you'll soon find yourself uncomfortably warm, leading to turning off the heating and even (shock, horror) removing those all-important layers, which only results in a temperature yo-yo effect. What’s more, reducing your thermostat by just one degree could trim nearly £100 from your gas bill. If you notice your gas bill rocketing and your heating making minimal impact, remember to book a boiler service as it may not be running efficiently.

Will my thermostat mean that my house is the same temperature in every room?

It's a common misconception that setting the thermostat at, say, 18 degrees will evenly maintain that temperature in every room of your house. However, unless you have a thermostat in each room, this is not the case. Your thermostat controls the heating based on the temperature in the room it's placed in. For example, if your thermostat is located in a warmer room like the kitchen, the heating will switch off when the kitchen reaches 18 degrees, even if the rest of the house is still colder. Conversely, if the thermostat is positioned in a cooler area like a hallway, the rest of the house might become excessively warm, but the heating won't stop until the hallway reaches the target temperature.

By monitoring your gas consumption closely, you can discover the most cost-effective heating method for your home. Follow Trust A Trader on Facebook or X for more tips on heating your home, and keeping it warm.

Looking for more heating advice?

Find clear, practical answers to common heating questions, helping homeowners understand everyday issues, know what checks they can carry out safely, and when it is best to contact a qualified professional.

  • What is the difference between a combi boiler and a system boiler?

    A combi heats water straight from the mains on demand - no cylinder needed, which makes it compact and ideal for smaller homes or flats. A system boiler works with a hot water cylinder, storing a ready supply that can serve multiple taps or showers at once without the pressure dropping - better for larger homes with more bathrooms. There's also the conventional boiler, which needs both a cylinder and a cold water tank in the loft - common in older properties. A heating engineer can help you figure out which suits your home best.

  • Is an air source heat pump right for my home?

    Heat pumps pull warmth from the outside air (even when it's cold) and use it to heat your home and hot water. They work best in well-insulated homes, ideally with underfloor heating or larger radiators that work well at lower temperatures. In draughty or poorly insulated properties, the benefits are more limited. The Boiler Upgrade Scheme currently offers a grant of up to £7,500 towards installation, so it's worth getting a professional assessment to see whether your home is a good fit before committing.

  • How often should a boiler be serviced?

    Once a year, by a Gas Safe registered engineer. It keeps the boiler running safely, catches small issues before they become expensive, and is usually a condition of the manufacturer's warranty. Some home insurance policies require proof of regular servicing too. If you're not sure when yours was last done, book one before winter - better to find out before you're sitting in a cold house!

  • Why is my radiator cold at the top but warm at the bottom?

    This issue is almost always trapped air. Bleeding the radiator - using a radiator key to release the air - usually sorts it, and it's one of the few heating jobs you can safely do yourself. If bleeding it doesn't work, or if several radiators are having the same problem, it might be a pressure or pump issue. Worth getting a heating engineer in to have a look.

  • What are the signs my boiler needs replacing?

    Keep an eye out for: frequent breakdowns, energy bills going up without using more heat, unusual noises (banging, kettling, or whistling), a flame that's yellow or orange instead of blue, and any visible leaks or rust around the unit. If your boiler is over fifteen years old and ticking any of those boxes, replacing it is usually the more economical choice - modern boilers are significantly more efficient.

  • Is underfloor heating worth it and do I need a professional to install it?

    For a new build or a big renovation, underfloor heating is often a great investment - it heats rooms more evenly than radiators and can be more efficient, especially alongside a heat pump. Retrofitting in an existing home is more of a job, and how worthwhile it is depends on your floor types and how much disruption you're happy to deal with. Either way - wet or electric - it has to be installed by a qualified professional.

  • Why does my boiler keep losing pressure?

    Some pressure drop over time is normal, but if you're topping it up regularly there's usually a cause: a small leak in the system (which isn't always easy to spot), a pressure relief valve that's releasing water, or air in the system after bleeding radiators. Topping it up via the filling loop is fine as a short-term fix, but if you're doing it more than a couple of times a year, it's worth getting an engineer to look into why it keeps happening.

Have a question about TrustATrader?

If you have a question in relation to TrustATrader specifically, please check out the TrustATrader FAQs, with separate lists tailored to consumers and tradespeople. Alternatively, get in touch with our team. We're happy to help!