Ever wonder why we design hot-water systems around 180-degree water, and steam systems around a maximum of 2-psi pressure? It all began at a meeting that took place in New York City in mid-December, 1899. They called themselves The Carbon Club, and what they did in two days was remarkable.

I like what they're doing at the Cleveland Museum of Natural History with this Passive House. Plenty of visitors will get to see what's possible as they visit this summer, and one lucky family will reap the benefits of this super-insulated home in the years to come.

You don't want to be burning most of the coal at the same time. Don't believe me? Check out what these scientists are saying. And, hey, watch where you put those volcanoes.

I'm no molecular engineer but I slogged though this article and gave some thought to how one man's ceiling is another man's floor. By blowing holes in a theory, this fellow is opening the door to other perspectives, which is always healthy. Stay tuned.

But this Austrian-built passive house seems to be doing just fine. I like this article because it gives a lot of detail about the construction. Keep your eyes on this movement. It's growing.

Not in this house. Thanks to subscriber, Bob Waddell, for sharing this one with us. How would you heat this place?

Want to loose some tonnage? These experts say you should turn down the thermostat and start flapping your arms and stomping your feet to keep warm. Thanks to my buddy, Nevin Soric, for the heads-up. Nev has the best Mustang site around. Check it out here.

A vintage solar slide show for your viewing enjoyment. How about that 1939 solar house? Once again, leave it to MIT.