Sorry SolReka, I have to level a small criticism that your excellent site seems to endorse what I consider is a fraudulent product. The previous edit of my post wrongly assumed you to have a commercial link with the product, and why not, in general?
Do you think it's true that the heat from a candle could noticeably warm a room? With the help of this device?
To a simpleton the thing looks technical. What it does is absorb some of the heat from the candle flame and translate this into infra-red radiation instead of just heating the air which would otherwise circulate by convection. Is it not suggested that the device increases the heat output?
Otherwise what does it do?
This is 'small beer' in the large picture of alternative energy, but the manufacturers know that the energy released at the moment the flame burns cannot be increased afterwards. So what are they selling? the conversion of convected into radiant heat. From a candle?