Being an Application Engineer at EXAIR you tend to do a good amount of return on investment (ROI) calculations. This is mainly to tell customers just how fast installing an EXAIR product on their system is going to pay its purchase price back and start saving them money.
In order to do these calculations there are several variables we must know. The list is below.
- Cost of EXAIR Product (This is an easy one for us to know.)
- EXAIR Product Consumption (Another easy one!)
- Current Product Consumption (If this is an unknown, we will test it for free!)
- Cost of Compressed Air / 1,000 SCF (This is the most common unknown.)
With these four variables we can calculate the amount of air and the amount of money the EXAIR product will save over an existing non-engineered blowoff. Let me address the two variables which have to come from you, the customer.
Current Product Consumption – If this value is not known please don’t guess at it. We offer a free service which we refer to as our Efficiency Lab where you send us in your existing blowoff device and we will test it for force flow and noise level. If you don’t know what pressure you are operating the piece at we will help you find out how to get that and then we will test our products at the same pressures. This way you get a true apple to apples comparison. Then, once we are done testing, you will get a recommendation from us in a formal report as to what EXAIR product will best replace your existing product. Then we will pay for return shipping of your blowoff device back to you. So, if you don’t know how much air you are currently using then give us a call. We will figure it out for you.
Cost of Compressed Air/ 1,000 SCF – This is more often than not, the unknown variable in the equation. The good news is there is a general standard assumption of twenty-five cents per 1,000 Standard Cubic Feet of compressed air. This works out to be around 8 cents per kW/hr. So even if you don’t know what you pay to compress the air, if you know what you are paying per kilowatt hour for your energy then we can calculate within reason what it costs for you to generate your compressed air. For reference, 8 cents per kilowatt-hour falls between the average US cost per kilowatt hour for commercial end-users (10.7/kWh) and industrial end-users (6.9/kWh).*
The best part of all is…EXAIR has a calculator available right on our website which provides air and dollar savings per minute, hour day and year as well as a payback in days for the EXAIR product purchase. On top of that, any step along the way that you aren’t sure of, we will help you out for free, even testing your product!
In case you would like to see the math, the formula used is below.
*latest U.S. EIA report here