Unveiling the Secret to Uniform Heating: How to Remove Air from Radiators

How to eliminate air and vent radiators and radiators? In this article we will accompany you, step by step, to make your heating system more efficient.

Have you ever noticed that during the cold winter months, some radiators seem to emit less heat than others? This annoying issue is often caused by trapped air in your radiators and heaters. But fear not, because we have the solution! In this article, we will guide you step by step on when and how to remove air from radiators to ensure even heating throughout your home. This procedure is suitable for both cast iron and aluminum radiators, including bathroom towel warmers and towel radiators.

The Problem of Air in Radiators

Air trapped in radiators is a silent enemy of your thermal comfort. When air accumulates within the system, it hinders the efficient circulation of hot water, reducing the effectiveness of your heating. As a result, some rooms remain colder than others, creating an uncomfortable and unwelcoming environment.

The Remedy: How to Remove Air

The good news is that removing air from radiators is a relatively simple task that can be performed by anyone with basic DIY skills. The following video will show you a classic and reliable method to do it, using only a screwdriver and a cloth. So, get ready to get to work!

Step 1: Prepare Your Tools

You will need a screwdriver and a clean cloth. Make sure you have these tools at hand before proceeding.

Step 2: Purge the Radiators

Now it's time to purge the radiators. Follow these steps:

  1. Start with the farthest radiator along the path of the water.
  2. Use the screwdriver to slowly unscrew the bleed valve located at the top of the radiator.
  3. Place the cloth under the valve to catch any water droplets.
  4. Listen for the air coming out. When you stop hearing air and only water comes out, close the bleed valve.
  5. Repeat this process for every radiator in your home, working your way toward the radiator closest to the boiler.

Step 4: Check the System Pressure

After purging the radiators, be sure to check the pressure of your heating system. If it's too low, add water to the system following the manufacturer's instructions. Make sure to properly close all bleed valves after completing the process.


Eliminating air from radiators is an essential step to ensure uniform heating throughout your home. Even though many people are already familiar with this method, it's always useful to be reminded of it. By following the steps described above, you can enjoy a warm and comfortable environment in every corner of your home. So, get comfortable, follow us in the video tutorial, and get ready to defeat the cold air in your radiators. Your thermal comfort will thank you infinitely!