How do I measure gas consumption of a boiler?

Measure the gas meter reading before and after a timed period (e.g., 60 seconds) with only the boiler running. The difference in liters divided by time gives the consumption rate, which can be converted to kW using the gas calorific value.

What is the calorific value of natural gas?

Dutch low-calorific gas (G25/Groningen) has approximately 8.83 kWh/m³. High-calorific natural gas (G20) has approximately 9.7 kWh/m³. In imperial units, natural gas is approximately 1030 BTU/ft³.

How do I convert gas consumption to kW?

Convert liters to m³ (divide by 1000), calculate m³/hour from your measurement time, then multiply by the gas calorific value (8.83 or 9.7 kWh/m³) to get the burner load in kW.

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