CFM Temperature Rise Calculator

Formula

To calculate the temperature rise (\(TR\)):

\[ TR = \frac{CFM \times 1.08 \times TD}{BTU} \]

Where:

\(TR\) is the temperature rise in degrees Fahrenheit (°F)
\(CFM\) is the cubic feet per minute
\(TD\) is the temperature difference in degrees Fahrenheit (°F)
\(BTU\) is the British Thermal Unit

What is CFM Temperature Rise?

CFM Temperature Rise refers to the increase in temperature of air as it passes through a heating or cooling system. It is a critical parameter in HVAC (Heating, Ventilation, and Air Conditioning) systems, as it helps in determining the efficiency and performance of the system. The temperature rise is influenced by the airflow rate (CFM), the temperature difference between the inlet and outlet air, and the energy input (BTU) to the system. Understanding and calculating the CFM temperature rise is essential for designing and optimizing HVAC systems to ensure they meet the desired heating or cooling requirements.

Example Calculation 1

Let's assume the following values:

Cubic Feet per Minute (\(CFM\)) = 400
Temperature Difference (\(TD\)) = 30 °F
British Thermal Unit (\(BTU\)) = 80,000

Using the formula:

\[ TR = \frac{400 \times 1.08 \times 30}{80000} = \frac{12960}{80000} = 0.162 \text{ °F} \]

The temperature rise is approximately 0.162 °F.

Example Calculation 2

Let's assume the following values:

Cubic Feet per Minute (\(CFM\)) = 500
Temperature Difference (\(TD\)) = 25 °F
British Thermal Unit (\(BTU\)) = 100,000

Using the formula:

\[ TR = \frac{500 \times 1.08 \times 25}{100000} = \frac{13500}{100000} = 0.135 \text{ °F} \]

The temperature rise is approximately 0.135 °F.