Cfm To Btu Conversion Calculator

CFM to BTU Conversion Formula:

\[ BTU/h = CFM \times 1.08 \times \Delta T \]

BTU/h (BTU per hour):

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1. What is CFM to BTU Conversion?

The CFM to BTU conversion calculates the heating or cooling capacity in British Thermal Units per hour (BTU/h) based on airflow in cubic feet per minute (CFM) and temperature difference. This is essential for HVAC system design and analysis.

2. How Does the Calculator Work?

The calculator uses the CFM to BTU conversion formula:

\[ BTU/h = CFM \times 1.08 \times \Delta T \]

Where:

\( BTU/h \) — British Thermal Units per hour
\( CFM \) — Cubic feet per minute (airflow)
\( 1.08 \) — Conversion constant
\( \Delta T \) — Temperature difference in °F

Explanation: The constant 1.08 represents the product of air density (0.075 lb/ft³) and specific heat of air (0.24 BTU/lb·°F) multiplied by 60 minutes per hour.

3. Importance of CFM to BTU Conversion

Details: This conversion is crucial for HVAC professionals to determine the heating or cooling capacity required for a space, ensuring proper system sizing and energy efficiency in ventilation and air conditioning systems.

4. Using the Calculator

Tips: Enter CFM value (must be greater than 0) and temperature difference in °F. The calculator will provide the corresponding BTU/h value for heating or cooling capacity calculations.

5. Frequently Asked Questions (FAQ)

Q1: What does the constant 1.08 represent?
A: The constant 1.08 is derived from air density (0.075 lb/ft³) × specific heat of air (0.24 BTU/lb·°F) × 60 minutes/hour = 1.08.

Q2: Can this formula be used for both heating and cooling?
A: Yes, the formula works for both heating and cooling applications, as it calculates the energy transfer based on temperature difference.

Q3: What are typical CFM values for residential systems?
A: Typical residential HVAC systems range from 400-2000 CFM depending on the size of the home and system capacity requirements.

Q4: How accurate is this conversion?
A: The conversion is accurate for standard air conditions at sea level. For high altitudes or extreme conditions, adjustments may be needed.

Q5: What temperature difference should I use?
A: Use the actual temperature difference between the supply air and return air for accurate BTU/h calculations in your specific application.