Enter the total cost, operational cost, and airflow (in CFM) into the calculator to determine the cost per CFM.
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Cost Per CFM Formula
The following equation is used to calculate the Cost Per CFM.
CPCFM = (TC + OC) / CFM
- Where CPCFM is the cost per CFM ($/CFM)
- TC is the total cost ($)
- OC is the operational cost ($)
- CFM is the airflow capacity (cubic feet per minute)
To calculate the cost per CFM, sum the total and operational costs, then divide by the airflow capacity (in cubic feet per minute).
What is a Cost Per CFM?
Definition:
Cost per CFM typically refers to the average cost associated with generating or moving one cubic foot of air per minute. This metric is crucial in understanding the cost-efficiency of various air handling systems such as fans, air conditioners, and ventilation units.
How to Calculate Cost Per CFM?
Example Problem:
The following example outlines the steps and information needed to calculate the Cost Per CFM.
First, determine the total cost of the system. In this example, the total cost (TC) is $500.
Next, determine the operational cost (OC). In this case, the operational cost is $200.
Then, find the airflow capacity (CFM). Suppose the system provides 1,000 CFM.
Finally, calculate the cost per CFM using the formula above:
CPCFM = (TC + OC) / CFM
CPCFM = ($500 + $200) / 1,000
CPCFM = $700 / 1,000
CPCFM = $0.70 / CFM
FAQ
What factors can affect the cost per CFM?
The cost per CFM can be influenced by a variety of factors, including installation costs, equipment type, energy efficiency, maintenance intervals, and the local cost of electricity or other energy sources. Different fan or ventilation system designs can also drastically impact overall efficiency and operational costs.
How can I reduce my cost per CFM?
To reduce cost per CFM, consider investing in energy-efficient systems, optimizing airflow patterns, and performing regular maintenance. Upgrading to high-efficiency motors or adjusting fan speeds to match demand can also significantly lower operational costs.
Is a higher or lower cost per CFM always better?
Generally, a lower cost per CFM is desired as it indicates greater cost-effectiveness. However, the optimal cost per CFM may also depend on factors such as system reliability, air quality requirements, and the specific needs of your operation. Balancing upfront investments with long-term energy savings is key when choosing an air movement system.