Stirlingengineforum.com

Family spends more than $1,600 a year on home utility charges, yet making some straightforward changes round the home can save cash and make cooling and heating systems more effective, according to World Energy Solutions, a public traded energy services company based in St. Petersburg, Fla.

This is not a Plumbing site even if some of us use plumbing parts, but thanks for the interest, maybe you could build a Stirling Engine to help save the energy in your household, I wrote a bit on your other site. Ian S C