CFM to kW Calculator

Formula

To calculate the power in kilowatts:

\[ kW = \frac{CFM \times \text{Electricity Cost}}{\text{Efficiency} \times 3412} \]

Where:

$kW$ is the power in kilowatts
$CFM$ is the air flow in cubic feet per minute
Electricity Cost is the cost per kilowatt-hour
Efficiency is the system efficiency as a decimal
3412 is the conversion factor from BTU/hr to kW

What is CFM to kW Conversion?

CFM to kW conversion is a calculation used to determine the power required to move a certain volume of air. This is particularly useful in HVAC systems and other applications where air flow is a critical component. The conversion takes into account the efficiency of the system and the cost of electricity to provide a measure of the power in kilowatts.

Example Calculation 1

Let's assume the following values:

Air Flow ($CFM$) = 1000
Electricity Cost = $0.12/kWh
System Efficiency = 0.85

Using the formula:

\[ kW = \frac{1000 \times 0.12}{0.85 \times 3412} = 0.0418 \text{ kW} \]

The power required is approximately 0.0418 kW.

Example Calculation 2

Let's assume the following values:

Air Flow ($CFM$) = 2000
Electricity Cost = $0.15/kWh
System Efficiency = 0.90

Using the formula:

\[ kW = \frac{2000 \times 0.15}{0.90 \times 3412} = 0.0978 \text{ kW} \]

The power required is approximately 0.0978 kW.