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You hear noises in your hot water pipes? The heat is not evenly distributed on your radiator? It is likely that air has entered the circuit: it must be evacuated. This can be done several times a year, but it is important to vent the radiators at least once before winter.

Evacuate the air from a radiator: a few simple steps

Before removing the air from a radiator, be sure to turn off the accelerator of your boiler, or to put it in summer position. It must not be in operation while you work on your radiators.

To evacuate the air, it's very simple: place a container under the bleed screw of your radiator, then unscrew it until the air escapes. The screw is opposite the control valve. Once the air has escaped, water begins to drain. When the water flows continuously, close the screw. That's it, the air has been evacuated! Repeat on your other radiators.

After evacuating the air from the radiators of your home, you will have to restore the pressure of the boiler. Pour some water into the fill valve until the pressure needle reaches 1 bar. The filling valve is located near the boiler. Ask a technician if in doubt.

Evacuate the air of a radiator: a necessity

It is possible that air enters the hot water circulation system. This is not very serious, because it is enough of a small gesture of maintenance to remedy it, but a bubble of air in the circuit can have consequences:

  • A radiator that does not work very well, if at all (it is hot down but cold at the top),
  • Higher energy consumption, precisely because of the lack of performance mentioned above,
  • Annoying noise in the pipes...

Evacuating the air from your radiators helps to maintain your heating network and ensure its long-term operation.


Video Instruction: How to bleed air from a radiator. Get more heat from your radiators.