Please could someone explain why the system must be under pressure and the optimum pressure to have the boiler at. Also if higher pressure what effect will it have and what effect will lower pressure have. No reason for asking, just curious!
Boiler Pressure
- Thread starter Vinno
- Start date
The system must be under pressure to enable air to be bled from radiators..with traditional open vented systems that pressure may be less than a meter head.
Having a system with a higher pressure raises the boiling point of water and can assist in noise reduction. In addition it reduces air ingress to the system.
Most combis and other sealed systems are set around 1 to 1.5 Bar cold pressure since this is sufficient pressure to cope with most boiler locations in a 3 storey house. Ideally the system should not run at more than 2 Bar when hot.
Having a system with a higher pressure raises the boiling point of water and can assist in noise reduction. In addition it reduces air ingress to the system.
Most combis and other sealed systems are set around 1 to 1.5 Bar cold pressure since this is sufficient pressure to cope with most boiler locations in a 3 storey house. Ideally the system should not run at more than 2 Bar when hot.
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