1. What Is CFH to BTU Conversion?

CFH to BTU conversion calculates the heat output of natural gas based on its flow rate. CFH (cubic feet per hour) measures gas volume flow, while BTU/h (British Thermal Units per hour) measures heat energy output.

2. How Does the Calculator Work?

The calculator uses the natural gas conversion formula:

Where:

• \( BTU/h \) — Heat output in British Thermal Units per hour
• \( CFH \) — Gas flow rate in cubic feet per hour
• \( 1025 \) — Average BTU content per cubic foot of natural gas

Explanation: The formula converts gas volume flow to heat energy output using the standard energy content of natural gas.

3. Importance of BTU Calculation

Details: Accurate BTU calculation is essential for sizing heating equipment, determining fuel requirements, calculating energy costs, and ensuring proper system performance for natural gas appliances.

4. Using the Calculator

Tips: Enter the gas flow rate in cubic feet per hour (CFH). The value must be greater than zero. The calculator will output the corresponding heat energy in BTU per hour.

5. Frequently Asked Questions (FAQ)

Q1: Why is 1025 used as the conversion factor?
A: 1025 BTU/ft³ is the average heat content of natural gas in the United States, though it can vary slightly by region and gas composition.

Q2: What is CFH in gas measurement?
A: CFH stands for cubic feet per hour and measures the volume of gas flowing through a system per hour.

Q3: How accurate is this calculation?
A: The calculation provides a good estimate for most residential and commercial applications, but actual BTU content can vary by 5-10% depending on gas source.

Q4: Can this be used for propane or other gases?
A: No, this calculator is specifically for natural gas. Propane has a different energy content (approximately 2,516 BTU/ft³).

Q5: What are typical CFH values for household appliances?
A: Furnaces: 50-200 CFH, Water heaters: 20-50 CFH, Stoves: 15-40 CFH, depending on appliance size and efficiency.