Last night I learned about Drain Heat Exchangers – they work just like Ground Source Heat Pumps, but rather than extract heat from sun-warmed earth, they extract it from warm drain water. I need to look into prices and their efficacy, but on the face of it they sound great. We should be able to harvest the drain-water for re-use in the garden, cisterns etc, and also take the heat from it. How cool is that?
June 16, 2011 at 12:22 pm |
I feel so much happier now I udenstrand all this. Thanks!