Bleeding the heater: Before it gets cold, make the heater ready to go again!

Just as you drive your car to the winter check every year before the first snowflakes fall, it goes without saying that you should winterize your radiators and vent the heater. Because in the summer months, often unnecessarily much air has accumulated in the radiators, which can significantly limit their thermal output and thus consume more energy. The expert tip from Claudia Lurz, Head of Product Management at radiator specialist Zehnder, explains in detail how the radiator is properly ventilated.

Often one notices it also by the gurgling noise in the heating mode, that it is high time for a venting of the radiator. The venting ensures that the radiator is again completely drained with hot water, can use its entire surface to dissipate heat and efficiently releases the generated heat to the room. A radiator vent can easily be done even at home, taking into account a few tips to vent the heater.

Bleeding heater - instructions and tips:

Bleeding the heater: Before it gets cold, make the heater ready to go again!: heater

1. First collect the necessary things: a rag that can absorb water or a small bowl to catch any leaking water. And of course the vent key for the square (replacement is available in any hardware store) or a slot screwdriver, if it is such an air valve, or possibly the manufacturer supplied by the vent set. The pump tongs better leave in the tool box. This will quickly scratch and deform the surface.

2. Before venting the actual heater, open the valves to their maximum by setting the thermostats to the highest setting.

3. If you have to vent several radiators, it is worthwhile to switch off the heating system. This minimizes the heating water flow.

4. To vent, place the key on the bleed valve and turn slightly counterclockwise. Usually half a turn is enough, in any case turn with caution and do not unintentionally unscrew the entire vent valve.

5. The air outlet is well audible by incipient sibilants. Come with Gurgel- and Blubbergeräuschen the first drops of water from the valve, you catch them with the rag, continues for a moment until a steady thin stream pours from the vent valve in the rag.

Bleeding the heater: Before it gets cold, make the heater ready to go again!: vent

6. Close the valve immediately or turn it back. The radiator is vented. Turn the thermostats back to their initial position and, if necessary, turn on the heating system again.

7. Finally, one should also check the water pressure on his heating system. It should be over 1.2 bar. If too low, heating water must be topped up. This will once again optimize the efficiency of the radiators.

Source: Zehnder GmbH, Lahr

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