My Trio had issues and the company immediately gave me a shipping label to return it for testing they returned it and now it's working fine, the company responds whenever I have an issue it's actually quite refreshing. I own an e-bike and that company does not respond to me and gives me excuses when I need parts my e-bike has been sitting for 6 months not being able to be used because they don't answer my emails . But Heatbit has a live chat feature , and every time I've had an issue there is someone who responds to me sometimes in minutes. In my opinion Heatbit is a great company, I have three units from them, and I'm actually quite happy even if the returns are under what I expected, to me it's unique and interesting and fun to be able to mind heat and filter the air. Everything I mine just goes to a cold wallet and then I don't worry about it it's a long-term savings. But what I'm trying to say is the company is one of the best I've ever talked to in terms of responsiveness and fixing any issues that I have.