1. What is BTU/hr to CFH Conversion?

The BTU/hr to CFH (Cubic Feet per Hour) conversion calculates natural gas flow rate from heat input. This is essential for sizing gas lines, appliances, and understanding fuel consumption in heating systems.

2. How Does the Calculator Work?

The calculator uses the simple conversion formula:

Where:

• \( CFH \) — Cubic Feet per Hour (ft³/hr)
• \( BTU/hr \) — British Thermal Units per Hour
• \( 1000 \) — Conversion factor (BTU per cubic foot of natural gas)

Explanation: This formula assumes natural gas with an energy content of approximately 1000 BTU per cubic foot, which is standard for most utility-grade natural gas.

3. Importance of Gas Flow Calculation

Details: Accurate CFH calculation is crucial for proper sizing of gas piping, ensuring adequate fuel supply to appliances, compliance with building codes, and efficient system design.

4. Using the Calculator

Tips: Enter BTU/hr value (must be greater than 0). The calculator will automatically compute the corresponding CFH for natural gas flow.

5. Frequently Asked Questions (FAQ)

Q1: What is the energy content of natural gas?
A: Standard natural gas typically contains 1000-1050 BTU per cubic foot, though this can vary by region and gas composition.

Q2: Why is CFH important for gas appliances?
A: CFH determines the required gas pipe size to ensure adequate pressure and flow rate for proper appliance operation.

Q3: Can this calculator be used for propane?
A: No, propane has a different energy content (approximately 2500 BTU per cubic foot). Use appropriate conversion factors for propane systems.

Q4: What factors affect gas flow calculations?
A: Pipe size, length, pressure drop, elevation changes, and the number of fittings all impact actual gas flow capacity.

Q5: How accurate is the 1000 BTU/cf assumption?
A: It's a standard industry average. For precise calculations, consult your local gas utility for the exact heating value in your area.