Frequently Asked Questions

Q -- Is there financing available?

A -- Our customers have worked with Mike Maher at North Star Leasing in Vermont (802-860-3565). Mike knows our company, our products and our customer base.  In addition, we offer in-house financing to qualified buyers for 50% of the HVO System cost.

Q – Are the parts oxygen rated?

A – Yes. For safety and longevity, we use only oxygen rated, oil-free parts.

Q – Will the HVO System operate in my unheated workshop?

A – The HVO System can only operate in temperatures above 45 F and below 100 F. 

Q How much oxygen fits in a tank?

A It depends on the size of the tank and the pressure. The Standard compresses to 100 psi, whereas the Mighty Mite and MAX compress to 150 psi.

1 gallon = 0.1337 cubic feet.  1 cubic foot compressed to 100 psi is reduced to about 1/8th of its uncompressed size. 1 cubic foot compressed to 150 psi is reduced to about 1/11th of its uncompressed size. Therefore:

  • 20 gallon tank contains 21 cubic feet @ 100 psi, and 30 cubic feet @ 150 psi
  • 30 gallon tank contains 31 cubic feet @ 100 psi, and 45 cubic feet @ 150 psi
  • 60 gallon tank contains 63 cubic feet @ 100 psi, and 90 cubic feet @ 150 psi
  • 80 gallon tank contains 84 cubic feet @ 100 psi, and 120 cubic feet @ 150 psi

Q – Is there a warranty?

A – Yes. All HVO Systems and HVO Drones come with a three year warranty. New Respironics oxycons purchased through HVO are also covered by a 3 year warranty.

Q – What sort of electrical power do I need?

A – The HVO Systems run on standard household power. A dedicated circuit is required for the Master and a separate dedicated circuit for the Relay Box. We sell 3-outlet (20 amps required) and 5-outlet (30 amps required) Relay Boxes.

Q – How much does it cost in electricity to run the HVO System?

A – It costs about 70 cents in electricity to generate the equivalent of a K-tank (based on Portland, Oregon kw rates). Use our calculator to get an estimate based on your specific requirements.

Q -- How do I calculate the electrical usage of my HVO System in wattage?

A -- Add the number of components in your System (ie, oxygen concentrators, HVO Master and Drones). Multiply that number by 550 for approximate wattage. For example, a 20 Mighty Mite and 3 M10s equals 4 components. 4 x 550 = 2,200 watts. For amperage, multiply each component by 5. In this example, 4 components x 5 amps = 20 amps. When calculating usage, keep in mind that the system runs about 50-60% of the time during the course of a work day. Use our calculator to get an estimate based on your specific requirements.

Q -- What is the payback period on the HVO System?

A -- The precise payback period depends on your usage and configuration. Use our calculator to get an estimated payback period.

Q -- Over a 3 year period, how much will I save using the HVO System instead of compressed or liquid oxygen?

A -- Depending on your local oxygen costs, small shops can save around $7,000, large shops can save around $70,000. Use our calculator to get a three year Return-On-Investment estimate.

Q -- How long can I run my compressor before it needs maintenance?

A -- If anyone tells you that they have a special compressor in which the piston cups do not wear out, they are not telling the truth. All compressors need to have their piston cups replaced from time to time. The wear on a piston cup happens where the seal meets the tank. Where there is compression, there is friction, heat, and wear. There is no magic that can change this fact -- it’s just physics.

High-powered, two-stage compressors need piston cup replacements every two to three years, depending on usage. Small low-flow, low-pressure compressors need less frequent piston cup replacement. 

The HVO Standard compressor, for example, runs for a long time without the need for maintenance. In the 6-year history of HVO, we have replaced a total of 3 piston cups for this compressor.  By year 7, we expect that some customers will need to spend 20 minutes and roughly $9.00 to replace a piston cup. The only studio so far to need piston cups for an HVO Standard compressor was running 12-hour shifts, 6 days a week for 4 years. They saved more than $100,000 on O2 since buying the HVO system, so it’s fair to say they were happy to do it.

The Mighty Mite and the MAX have powerful, 2-stage compressors. Not only do they compress to 150 PSI, they maintain roughly the same compression rate throughout the cycle, which is really important. It means that your concentrators are working at their full flow rate, even when they’re pushing against the back pressure in the tank. The Mighty Mite is a custom 2-stage Thomas. The MAX is a large 2-stage Gast. 

If you have a small, low-flow Gast compressor that only compresses 28 liters a minute, your concentrators might be getting backed up. You can check this by looking at the flow meters on your concentrators when the tank is over 50 PSI. If the flow valve ball falls to a lower rate, it’s because the compressor is not able to compress all the oxygen your concentrators are producing. In this case, you need a stronger compressor. 

Q -- I have a question not answered in the FAQ. Whom do I contact?