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In order to properly adjust and / or maintain a residential gas furnace, a manometer is needed. Digital manometers are prefers as opposed to U-Tube variations, due to the readout display. A manometer can read the incoming pressure of gas in a gas fired unit. Some combustion analyzers, such as the Wöhler A 450, also offer the feature of measuring the gas pressure.
![[Translate to United States:] Wöhler A 450 L Produktvergleich](/fileadmin/user_upload/woehler/products/groups/P_16420/a550eco_table-section.jpg)