How to Get Your Radiators Ready for Winter

As the temperature drops, it's worth giving your radiators a quick check before your heating starts working harder. Some things you might not think are a big deal could stop your heating from running efficiently. Spotting cold patches and checking for trapped air are both simple steps you can take to keep your home warm throughout winter. In this guide, we'll take you through how to prepare your radiators, tackle common issues and work out if your current radiators are up to the job.

First Things First: Give Your Radiators a Health Check

Before you reach for the thermostat this winter, it's worth checking that your radiators are working as they should. Turning your heating on before the really cold weather arrives gives you time to spot any problems and get them sorted before you need your heating every day.

Start by switching on your central heating and letting your radiators warm up. Walk around your home and check each one, paying attention to how quickly it heats up, whether the warmth is even across the surface and if you notice any unusual noises. 

Here's what to look out for:

1. Cold spots:  If the top of your radiator stays cold while the bottom warms up, trapped air could be preventing hot water circulating properly. If the bottom stays cold, a build-up of sludge or debris could be to blame. These are useful clues, although other heating issues can cause similar symptoms.

2. Unusual noises:  Gurgling, bubbling or banging sounds are worth investigating. Gurgling can indicate trapped air, while banging may point to circulation issues, pipe movement or other problems within your heating system.

3. Leaks and rust: Take a closer look at the valves, pipe connections and the bottom edge of each radiator. Even a small drip or patch of corrosion is worth addressing before it develops into a bigger problem.

4. Slow-heating rooms:  If a room takes much longer to warm up than the rest of the house, check that the radiator isn't blocked by furniture or heavy curtains. If it still struggles to heat the space, the radiator, valves or wider heating system may need attention. 

5. Radiator valves:  Check that your thermostatic radiator valves (TRVs) aren't switched off or set too low. These control the temperature of individual rooms, so make sure they're set to suit how you use each space.

It's worth remembering that a radiator doesn't necessarily need replacing just because it isn't heating properly. Trapped air, sludge, faulty valves and problems elsewhere in the heating system can all affect performance.

If you spot a problem, deal with it before winter really kicks in. Some issues, such as trapped air, can be an easy fix by bleeding a radiator, while persistent cold spots, leaks or unexplained noises may need a qualified heating engineer to investigate. 

Once you've checked your radiators, you'll have a much better idea of whether your heating system is ready for the colder months - and whether anything needs a little extra attention.

3. Protect the area. Place an old cloth or small container underneath the valve to catch any escaping water.

4. Open the valve slowly.  Turn the radiator key anticlockwise by a small amount. You should hear a hissing sound as trapped air escapes.

5. Close the valve. Once the hissing stops and water begins to flow steadily, turn the key clockwise to close the valve. Avoid overtightening it.

6. Check your boiler pressure. Bleeding radiators can reduce the pressure in a sealed central heating system. Check your boiler manual and top up the pressure if needed, following the manufacturer's instructions.

Once you've finished, switch your heating back on and check whether the radiator warms up more evenly.

If the radiator remains cold at the bottom or continues to heat unevenly, trapped air might not be the cause. Sludge build-up, a faulty valve or another issue with your heating system may need further investigation.

Keep an eye on your boiler pressure

Your radiators can only do their job properly if your central heating system is working as it should, and this includes keeping an eye on your boiler pressure. If the pressure is too low, your heating may struggle to warm your home, leaving you with radiators that don't seem to be doing much.

Most modern combi boilers and sealed central heating systems have a pressure gauge or digital display that lets you check the pressure. Your boiler manual will tell you the recommended range, but many systems sit around 1-1.5 bar when cold.

Here's what to check before winter:

1. Check the pressure reading. Take a look at your boiler's gauge or display when the heating is off and the system has cooled down. Compare the reading with the manufacturer's guidance.

2. Look out for low pressure. If the reading is below the recommended range, your heating may not work properly. Some systems allow you to top up the pressure using a filling loop, but always follow your boiler manufacturer's instructions.

3. Keep an eye on pressure changes. It's normal for pressure to rise a little as the heating warms up. However, repeated drops or large fluctuations could indicate a leak or another issue that needs investigating.

4. Don't ignore frequent pressure loss. If you find yourself regularly topping up the system, contact a qualified heating engineer rather than treating it as a routine fix.

It's worth remembering that boiler pressure requirements vary, so don't assume the same reading is right for every system. If you're unsure how to check or adjust yours, consult the manual or ask a heating engineer for advice.

A quick pressure check now can help you spot potential problems before the cold weather sets in. Once that's sorted, it's time to look at a few simple ways to help your radiators heat your home more effectively. 

If your home still feels chilly despite making these changes, it may be worth looking at your insulation, draught-proofing and the heat output of your radiators.

If you're thinking about updating your heating, why not explore the different radiator styles available? From classic panel radiators that suit everyday spaces to vertical radiators that make use of narrow walls, there's a design to suit most rooms and interiors. 

And that brings us to another important question: are your radiators actually the right size for your rooms? A radiator that doesn't provide enough heat for the space can struggle to keep things comfortable, even when everything else is working properly. 

Is your radiator giving off enough heat?

If you've bled your radiators, checked your boiler pressure and cleared away anything blocking the heat, but your room still feels chilly, it might be time to look at your radiator's heat output.

Radiators come in different sizes and designs, and choosing the right one isn't just about finding something that fits neatly on your wall. It needs to produce enough heat to keep the room comfortable, even when the temperature outside takes a nosedive.

What are BTU's, and why do they matter?

BTU stands for British Thermal Unit. It's a measurement used to describe heat energy, and a radiator BTU rating indicates how much heat a radiator can produce under specific conditions. 

The higher the BTU output, the more heat the radiator can provide. If a radiator's output is too low for the room, it may struggle to maintain a comfortable temperature. On the other hand, choosing a radiator with a suitable output gives you a better starting point for keeping your space warm.

How do you work out what size radiator you need?

There's no one size fits all answer. The heat output your room needs depends on several factors:

• Room dimensions. Larger rooms generally need more heat than smaller spaces. Measure the length, width and height of the room to calculate its volume.
• Insulation. Well-insulated walls, floors and lofts help retain warmth, while draughty windows and poorly insulated rooms increase heat loss.
• Windows and external walls. A room with several windows or multiple external walls may lose more heat than an enclosed room of the same size.
• Room purpose. A bathroom may need a different heating allowance from a bedroom or living room, particularly if you want it to feel comfortably warm after a shower.
• Radiator type. Different radiator designs and sizes produce different heat outputs. Always check the manufacturer's stated BTU or wattage rating when comparing models. 

You can use our BTU calculator to get an initial estimate, but for a more accurate result, particularly in an older or poorly insulated property, a room by room heat loss calculation is the better option.

What if your current radiator isn't powerful enough?

You may be able to replace it with a radiator that offers a higher heat output, provided your available wall space and heating system can accommodate it. A larger radiator isn't always necessary, some designs can deliver a higher output without taking up significantly more wall space.

Before choosing a replacement, compare the heat output with your room's requirements rather than relying on appearance or dimensions alone.

The bottom line? The right radiator should look the part and provide enough heat for the space. Getting the output right can make a real difference to your comfort when winter arrives. 

If you're short on wall space, a double panel radiator, also known as type 22 radiators, can offer a higher heat output than a comparable single panel model, depending on its dimensions and specifications. Prefer a traditional style? Column radiators are often available in double, triple and sometimes even quadruple column options for an extra toasty home. For a bathroom, a heated towel rail can provide warmth while keeping towels cosy between uses.

Ready for a radiator refresh?

Winter is a good time to take a fresh look at your heating. If you're planning a room makeover or your existing radiator has seen better days, replacing it could be an opportunity to bring a little more style to your space. 

Radiators have come a long way from the standard white panels you might remember. From understated designs that blend into the background to bold finishes that make a statement, there's plenty of choice when it comes to finding one that suits your home.

Before settling on a design, check the available wall space, pipe connections and required heat output. A radiator might look perfect in your room, but it still needs to be suitable for your heating system and provide enough warmth for the space.

If you're considering an upgrade, explore our range of radiators to find a style that works for your home.