Bleeding your radiators is a task we should all perform but often forget to do so. Over time, the presence of air in your central heating system is unavoidable but you can ensure that you bleed your radiators and release the air before it becomes a problem. This article will explain how to bleed radiators and why you should do it.
Trapped air in your central heating system has a number of negative effects. Firstly, if there are air pockets in your radiators, hot water won't be able to fill the entire heater, diminishing its overall heat output. The movement of air through your system can also make a lot of noise, making it an annoyance. Over time, this build up of air leads to inefficient heating, wasting energy as you try to generate the same amount of heat as before with greater fuel expenditure. Bleeding ensures you can heat your property efficiently and consistently and put your money to better use.
Before bleeding, it helps to run a quick check of your individual radiators to see if you can locate the specific problem area. Switch on your heating and make sure that all of your radiators are turned up. This is important both for finding the radiators that need bleeding and because you'll need high pressure inside the unit in order for it to push the trapped air out. Once your radiators have warmed up, carefully check each individual unit to see if they're all warm. In particular, check the top of each radiator as air and gas travel upwards and are most likely to get trapped near the top of the unit. Cold spots are a sure sign that you should bleed your radiator, especially if the others in your system are functioning normally.
After bleeding your radiators and closing the bleed valves, it's important to check your boiler's pressure gauge. Pressure loss is a common side effect of bleeding your system and can be rectified by re-pressurising your boiler — your boiler's manual will walk you through this, or you can call our team if you're unsure.
Once you've checked your pressure, turn your heating back on and check each radiator one more time. If your radiators have been properly bled, they should now be consistently warm throughout, without any cold spots. Bleeding your radiators is a simple process and will help prevent greater problems in the future — it's a good idea to do it at the start of winter so you can be sure your system will perform when you need it most.
If you find yourself needing to bleed the same radiator repeatedly, it may be a sign that the radiator itself needs replacing. Browse our full range of radiators to find an upgrade that suits your home.
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