Central Heating Pressure Gauge in UK Home Stock Photo Image of britain, boiler 249979320

Managing the right boiler pressure is key to effective and safe heating. For most systems, the ideal ‘what should boiler pressure be’ reading ranges from 1 to 1.5 bar in a resting state to 1.5-2 bars during heating. Stay with us to learn how to monitor and maintain boiler pressure and why it matters for your boiler’s health and your comfort.. If the needle is below 1 (in the red zone), your boiler might have lost pressure. When the pressure is low, your central heating system won’t be working efficiently. If the pressure is above 1-1.5 bar when the boiler’s off, you need to bring it down to around 1.5 bar. You can do this by bleeding the radiators.


Central Heating Pressure Gauge in UK Home Stock Photo Image of britain, boiler 249979320

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[1] Power Technology and Engineering (formerly Hydrotechnical Construction), Volume 43, Number 4, 247-250, DOI: 10.1007/s10749-010-0105-4 – Thermal Power Stations, Temperature regime for damaged steam superheater coils, V. A. Bogachev (this is a PDF file – if you can’t find contact SpringerLeak). The normal operating water pressure for your boiler and central heating system is between 1.0 and 2.0 bar. If the pressure drops below 1.0 bar, you need to repressurise it. If the pressure goes above 3.0 bar, you will see water coming from the pressure relief valve (usually on an outside wall).