The dial-type meter used to measure the pressure in a heating unit's flue pipe is called a

The dial-type meter used to measure the pressure in a heating unit's flue pipe is called a

• A. Dial Gauge
• B. Differential Pressure Meter
• C. Pressure Gauge
• D. Manometer

Answer: (D)

Measuring the pressure in a heating unit’s flue relies on a device that compares the flue gas pressure to a reference using a liquid column—this is a manometer. A manometer works by balancing the pressure in the flue against the height of a liquid in a tube; the difference in liquid height (often read in inches of water) tells you the draft or suction in the flue. This direct pressure difference reading is ideal for venting and combustion safety, letting you see whether the draft is within the required range. Dial gauges, differential pressure meters, and standard pressure gauges each serve other purposes. Dial gauges measure pressure at a point and display it on a dial, but they aren’t specialized for capturing the small draft pressures in a flue. A differential pressure meter measures the difference between two pressures, which is broader than the typical flue draft check. A pressure gauge shows static pressure at a point, not the specific draft in the flue. The manometer, especially a dial-type or U-tube/Inclined version, is the instrument specifically used to assess flue pressure.

Measuring the pressure in a heating unit’s flue relies on a device that compares the flue gas pressure to a reference using a liquid column—this is a manometer. A manometer works by balancing the pressure in the flue against the height of a liquid in a tube; the difference in liquid height (often read in inches of water) tells you the draft or suction in the flue. This direct pressure difference reading is ideal for venting and combustion safety, letting you see whether the draft is within the required range.

Dial gauges, differential pressure meters, and standard pressure gauges each serve other purposes. Dial gauges measure pressure at a point and display it on a dial, but they aren’t specialized for capturing the small draft pressures in a flue. A differential pressure meter measures the difference between two pressures, which is broader than the typical flue draft check. A pressure gauge shows static pressure at a point, not the specific draft in the flue. The manometer, especially a dial-type or U-tube/Inclined version, is the instrument specifically used to assess flue pressure.