Risking a too good to be true "scam", I bought 4 Ecoheats to give two as gifts because of the so-called innovative "Eco Heat" design. This is so needed in this time of austerity by those who cannot afford much at all. Cruel to say the least if those in this situation were taken in.
Ecoheat's Website at shopecoheat.co

The Ecoheats arrived in reasonably good time from China but when I went to register them for the warranty I paid for, this was not possible. There were no product serial numbers, details in the packaging or on the product itself. I have tried to contact the company, writing to the address used when the order was confirmed. Every email has bounced back.
The cord is short so it is not easy to plug it into a good spot where it can effectively heat a room. The packaging was cheap. But, the heat came on quickly. As long as it is not too cold, it heats a room quickly. Cold air however, blows out the back. So a bit counter productive.
We'll see how long it lasts. I don't expect 'long' as it is impossible to register it for the warranty. NO contacts on any of the websites. Headache from it being on for any length of time so the claims of it having air filter qualities are meaningless.