1. What Is CFH Calculation?

CFH (Cubic Feet per Hour) calculation converts BTU (British Thermal Unit) heat output to gas flow rate based on the heating value of the gas. This is essential for sizing gas lines, appliances, and understanding fuel consumption rates.

2. How Does The Calculator Work?

The calculator uses the CFH formula:

Where:

• \( CFH \) — Cubic Feet per Hour (ft³/hr)
• \( BTU/hr \) — British Thermal Units per hour
• \( Gas\ Heating\ Value \) — Energy content of gas in BTU per cubic foot

Explanation: The formula divides the total heat output (BTU/hr) by the energy content of the gas to determine the volume of gas required per hour.

3. Importance Of CFH Calculation

Details: Accurate CFH calculation is crucial for proper gas appliance sizing, pipeline design, fuel consumption estimation, and ensuring efficient and safe operation of gas-powered equipment.

4. Using The Calculator

Tips: Enter BTU/hr value and gas heating value (typically 1000 BTU/ft³ for natural gas). All values must be positive numbers greater than zero.

5. Frequently Asked Questions (FAQ)

Q1: What is the typical heating value for natural gas?
A: Natural gas typically has a heating value of 1000-1050 BTU/ft³, but this can vary by location and gas composition.

Q2: How does gas heating value affect CFH?
A: Higher heating value gas requires less volume (lower CFH) to produce the same BTU output, while lower heating value gas requires more volume.

Q3: When is CFH calculation important?
A: Essential for sizing gas lines, selecting regulators, designing heating systems, and calculating fuel costs for gas appliances.

Q4: Can this calculator be used for propane?
A: Yes, but use propane's heating value (approximately 2500 BTU/ft³) instead of natural gas values.

Q5: What factors can affect gas heating value?
A: Gas composition, altitude, temperature, pressure, and moisture content can all affect the actual heating value of gas.