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Incandescent light bulbs are often criticized for having a luminous efficiency of only 5%.
However, flip-flop your perception and you have a device with a heating efficiency of 95%. Change the name from 'light bulb' into 'heatball', and same device transmogrifies from efficiency Class F to efficiency Class A.
The advantages of such a device are numerous. It can be used in passive houses to provide the very small amount of additional heating well-designed buildings require.
It can also be used in combination with heat pumps to provide that required extra bit of heating during the coldest and darkest winter days. The devices are extremely cheap, easy to install, and they fit into any E27 socket. Moreover, they are totally scalable: you can install as many as you want anywhere in the house, and each of them can have a heating power ranging between 25 and 300 W.
And here is yet another important consideration: heatballs do not disturb the power quality on the grid nor do they transmit disturbing electro-magnetic waves.
However, if you thought of getting rich by producing these elegant devices, you’re too late to use the name 'heatball'. The German engineer Rudolf Hannot has already registered the brand name, as you can see on his Website
www.heatball.de.
Source
Leonardo Energy, The Global Community for Sustainable Energy Professionals
(MDN)
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