I own 2 VP-1s I own 2 VP-1s; 1 VH-1; and two VH-3s. The value for the price was initially excellent. But after a few months the VP-1 started beeping, meaning "low concentration". I cleaned everything, still beeps. I switched to new tubing, still beeps. There is nothing wrong with the air flow, but it still beeps. So the good investment is now a waste of $600. I tried the customer service phone but mailbox is full. I filled out the service form yesterday, no response so far.

Poor Customer Service. The product works fine. It is louder than they state it is. The customer service is non existent. First off, they state if you pay with pay pal you get 15% off. Nope, didn't happen. Wrote the company, no response. I've written them regarding the machine being loud. No response. My o2 numbers improved. The product arrived quickly but don't expect any type of service.

Very quite device It took me awhile to use it I wanted to get extra O2 tubes and something to clean them with. It is quieter than I thought it would be - I was using the nasal cannula wrong no instructions for that - I love the machine it helps me almost every night, so glad I have it - I would suggest a different hose connector though one that is tapered so it is easier to put the tubing on bless youall.

Everything like ads The VT-1 is everything advertised and specified on the website. I have tested both flow and O2 concentration percentage and they match the specifications. I did notice power consumption appeared to be only 50 watts when using 12-14v battery/car which is excellent and better than the 75 watts specified. I am thinking the 75watts is with the 120v AC power supply and you get some inefficiencies with the converter/adapter. The unit does live up to the 58db sound level specified, about the level of normal speech.

Great Portable at a Great Price I’ve had my Varon portable concentrator for a couple weeks now and I’m very pleased with it. I’ve borrowed a friend’s more expensive concentrator before and my Varon performs just as well and costs a lot less so I’m happy. The customer service is also very good. I really believe this company cares about its customers.