How much will I pay in electricity? (Part One)

Many people are curious to know if their electrical bill will skyrocket after making the switch to High Volume Oxygen. When the HVO System is properly specified, it will cycle on and off. For most glass studios, the system may run for half of the workday, or it may run for a couple of hours. The size of the system, the components being run and the amount of oxygen being used are all considerations when figuring out how much you’ll be paying in electrical costs.

Calculating Wattage

To figure out your electrical costs, you’ll need to know the watts being used over a period of time and your cost per kilowatt hour. To figure out watts, you can take the amps x voltage.

The High Volume Oxygen System uses about 4 amps at 120 volts, which using the above calculations makes 480 watts.

The technical data sheet from the M10s lets us know that their average power consumption is 600 watts.

How often is the system actually on?

In order to figure out our costs, we need to know when the system is charging and using electricity. Much of the time, the system will be providing oxygen, but not recharging.

View of Seeing Eye(TM) Graph during a murrine build and pull in the Lincoln Hot Glass studio.

At the Lincoln Hot Glass studio, our local High Volume Oxygen studio, we’ve got our Seeing Eye(TM) technology hooked up to the High Volume Oxygen system, which allows us to see various information about the system while it’s running, including: Oxygen Purity, Liters per Minute being used, Tank Pressure and most importantly for our calculations, when the system is on and charging, and when it is at rest.

The system was on and charging for a total of 215 minutes over the course of the 11 hour period in the studio from 3 pm to 2 am. Hours in Use: 3.58

Large Studio System

The Lincoln Hot Glass studio system expands and contracts occasionally, as the High Volume Oxygen shop is right next door. Sometimes we borrow components for our testing stations or for off-site demos. The setup during the above murrine build included a MAX 60 gallon Master and MAX 60 gallon Drone with eight 10 lpm oxygen concentrators. That’s two components using 480 watts and 8 components using 600 watts. Total wattage : 960 (HVO Master and Drone) +4,800 (8 oxygen concentrators) = 5,760

Now that we know how many watts we’re using and how many hours the system was running for, we can figure our kilowatt-hours (kWh). Our wattage (5,760) multiplied by the hours in use (3.58), divided by 1000. kWh: 20.6208

The last number we need to know is our cost per kWh, which changes depending on where you live or work (as well as whether you are classified as residential, commercial or industrial) In Lincoln, Nebraska, our residential $/kWh at this time is 8.9¢. (Of course, we’re located in a commercial space, but I’ll be using residential pricing and rounding up for the sake of showing the highest cost that you could expect.)

So, in this situation, the electrical costs of running the system for the duration of the murrine pull (11 hours) was $1.84. (The amount of oxygen generated was approximately two and a quarter ktanks.) If you worked this way for 3 days a week, 48 weeks out of the year, your annual electrical costs would be $265.

In this situation, the system is a large system meant for a teaching or rental studio, so there are more components than there would be in the same system specified for a one person studio.

Master and Drone system at Lincoln Hot Glass

Read on to see a medium studio setup…

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