BTU to Cubic Feet Per Hour Calculator

BTU to CFH Conversion Formula:

\[ CFH = \frac{BTU/h}{1025} \]

Cubic Feet Per Hour (CFH):

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1. What is BTU to CFH Conversion?

The BTU to CFH conversion calculates the cubic feet per hour of natural gas flow required to produce a specific heat output in British Thermal Units per hour. This conversion is essential for sizing gas lines, appliances, and understanding fuel consumption rates.

2. How Does the Calculator Work?

The calculator uses the conversion formula:

\[ CFH = \frac{BTU/h}{1025} \]

Where:

\( CFH \) — Cubic Feet per Hour (ft³/h)
\( BTU/h \) — British Thermal Units per Hour
\( 1025 \) — Conversion factor for natural gas (average BTU content per cubic foot)

Explanation: The formula converts heat energy output (BTU/h) to the volume of natural gas flow (CFH) required, based on the average energy content of natural gas.

3. Importance of BTU to CFH Conversion

Details: Accurate CFH calculation is crucial for proper gas appliance sizing, pipeline design, fuel consumption estimation, and ensuring adequate gas supply for heating systems, water heaters, and industrial processes.

4. Using the Calculator

Tips: Enter the BTU per hour value. The calculator will automatically compute the corresponding cubic feet per hour of natural gas flow. All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: Why is 1025 used as the conversion factor?
A: 1025 BTU/ft³ is the average heating value of natural gas, though this can vary slightly by region and gas composition (typically ranges from 1000-1100 BTU/ft³).

Q2: Can this calculator be used for other gases?
A: No, this calculator is specifically designed for natural gas. Other gases like propane (approx 2500 BTU/ft³) require different conversion factors.

Q3: What are typical CFH values for household appliances?
A: Typical ranges: furnace (50-200 CFH), water heater (30-50 CFH), stove (15-40 CFH), depending on BTU ratings.

Q4: How accurate is this conversion?
A: The conversion provides a good estimate for most applications, but actual gas composition and local heating values may cause slight variations.

Q5: Why is CFH important in gas system design?
A: CFH determines pipe sizing, regulator selection, and ensures adequate gas supply to prevent pressure drops and appliance malfunction.