Great to see the perception of energy-waste leading to new ventures. In the past century wasted energy had become a blind-spot (except when it led to some envir

Great to see the perception of energy-waste leading to new ventures. In the past century wasted energy had become a blind-spot (except when it led to some environmental effects - killing fish for example). Thought was seldom given to re-using heat (let alone storing it) after its primary purpose. (I don't recall ever seeing any meta-survey of the scope of this near-blindness ... but it has to have become enormous ...) Home-heating solutions have usually been limited to the cost for consumers rather than the environment. That will have to change drastically.