I think you don&#x27;t understand what co-generating heat is. It&#x27;s a part of generating electricity. You use that heat to heat up the next batch of water, so you end up spending less fuel turning it into steam.<p><a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Cogeneration" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Cogeneration</a>