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Comment on can you ELI5 the physics of bleeding radiators on an apartment building?

Successful_Try543@feddit.org ⁨3⁩ ⁨days⁩ ago

Usually, at the heating there is a junction for a hose with a valve and close by a pressure meter. If the pressure is too low, the janitor (not you) should fill up the heating with water until the pressure is sufficient. Ideally, the pressure should be checked again after bleeding the radiators.

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bstix@feddit.dk ⁨3⁩ ⁨days⁩ ago
Yup, that’s how it’s done when there’s a heat exchanger.

However there’s a reason why the boiler room is usually locked off in a 30 story building. Bleeding a radiator might be relatively harmless, but there’s no way of knowing what the pressure is supposed to be without knowing the entire system.

Some (lower) buildings might even have direct district heating without an exchanger, which is absolutely no go to even bleed.

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- Successful_Try543@feddit.org ⁨2⁩ ⁨days⁩ ago
  
  However there’s a reason why the boiler room is usually locked off in a 30 story building. Bleeding a radiator might be relatively harmless, but there’s no way of knowing what the pressure is supposed to be without knowing the entire system.
  
  Exactly, that’s why either the janitor knows the correct pressure or they need to call a technician.
  
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