Thanks zero. I've actually read a lot of Dan Holohan's stuff - he really
likes steam systems and has written much of what is available online about
| > I have heard this asserted just about everywhere universally, without a
| > single justification. Why is steam heat less efficient? Is it
| > intrinsically
| > less efficient than hot water-based heating systems, or is it simply
| > because
| > its typical installation is more wasteful?
| This address all of that;
They focus on industrial steam systems and how to improve efficiency. From
what I could tell, they do not address whether steam is intrsically less
efficient or whether the systems are poorly installed. Maybe you are
implying it doesn't matter. I think that is Dan Holohan's position.
| > My guess is that steam is less
| > efficient because all the old steam pipes have had their asbestos
| > insulation
| > removed and haven't been reinsulated since.
| Where has this happened?
Try Dan's other website -
| > Add to that the fact that steam
| > is much hotter and has less heat capacity than water and you have a
| > for a very inefficient system.
| That is opposite of the truth and incorrect at the same time;
| http://www.heatinghelp.com/newsletter.cfm?Id 7
From what I can tell, hot water systems operate around 200f. Steam is at
Specific heat of steam is half that of water. What I did not account for is
latent heat needed to turn liquid water into steam.
But it's ok if I am completely wrong - it was simply a guess on my part. The
point is, I am told definitively by the DOE that steam is less efficient
than hot water heat. I just wanted to know if this was true and if so, why?
| Spend a few days over at Google.com . It's all been asked/answered.
I have. That's a copout, zero. If you didn't know the answer, you didn't
have to reply.