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CFH to BTU Conversion Formula:
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The CFH to BTU conversion calculates the heat output in British Thermal Units per hour (BTU/h) based on the gas flow rate in cubic feet per hour (CFH). This conversion is essential for sizing heating systems and determining energy consumption.
The calculator uses the conversion formula:
Where:
Explanation: The formula multiplies the gas flow rate by the energy content of natural gas to determine the total heat output.
Details: Accurate BTU calculation is crucial for proper heating system sizing, energy efficiency analysis, fuel consumption estimation, and compliance with building codes and standards.
Tips: Enter the gas flow rate in cubic feet per hour (CFH). The value must be positive and greater than zero for accurate calculation.
Q1: Why is 1020 used as the conversion factor?
A: 1020 BTU/ft³ is the average heating value for natural gas, though actual values may vary between 950-1150 BTU/ft³ depending on gas composition.
Q2: Can this calculator be used for other gases?
A: No, this calculator is specifically designed for natural gas. Other gases like propane have different heating values (approximately 2500 BTU/ft³).
Q3: What is a typical CFH range for residential appliances?
A: Typical ranges: furnace 80-200 CFH, water heater 30-60 CFH, stove 20-40 CFH, depending on appliance size and efficiency.
Q4: How accurate is this calculation for real-world applications?
A: This provides a good estimate, but actual performance may vary due to factors like gas pressure, altitude, appliance efficiency, and exact gas composition.
Q5: What if I need to convert BTU back to CFH?
A: Use the reverse calculation: CFH = BTU/h ÷ 1020. This helps determine required gas flow for a specific heat output.