"The idea that, once the window opens, the rising warm air pulls in the cold air, I believe is not quite right. What I'm seeing here is a chicken and egg thing. As for chickens, who knows which came first. But as for which entity caused a change…"
"Wow. After several month's hiatus, this dormant thread surges back to life! :)
Bud, for your illustration here, I can't help but note that as soon as the window is opened and cold air enters, warm air directly adjacent to the window…"
"John, I've thought about something you hit upon in your reply regarding why "how the world works" seems to be lost on many people. Back when life for most human beings was more or less hand to mouth, knowing how the world worked made…"
"Causality in our case at hand?
Whatever upsets equilbrium. In Bud's illustration, Figure 1 has the indoor and outdoor conditions of the building at equalibrium. Only when the indoor air was heated above the outdoor air temperature was this…"
"Good way to put it, Ted. Well done.
The air columns in this case are the weights, and the pivot point is the building envelope. The air columns are at different weights due to their respective temperature/density continuums. As Bud's…"
"Bud, the illustration found at your link is excellent! In just one spot, several variables I've wrestled with when contemplating our topic at hand seem to merge beautifully. Well done!
In your example, you gave a measurement of 101,325 pascals…"
"What I keep looking at in your reference to the large LEED certified house in NY is the ratio of building size to normalized occupancy rate. Five stories, two people.
One can go on at length about hitting the LEED biggies like embodied energy…"
"Speaking from the HVAC side of things, the ongoing complaint I've heard about NATE is that the significance of NATE certification isn't heavily marketed toward the end user, meaning building and/or equipment owners. I think more people are…"
"Your mention of the low spot in the flex ducting collecting water (thereby soaking the insulation at some point, most likely) makes me wonder if internal duct lining may contribute to DSS. The OP is puzzled by his DSS in that he's running a gas…"
"Often, when I sense someone is ahead of me, I try not to plod on undeterred like I have no ability to sense they're already on my wavelength. It's not an easy skill to learn, but it's a necessary one. When people sense you are aware…"
""Hot air rises" may not be scientifically correct, but what easy, catchy phrase is there that could readily supplant it? "Cold air displaces hot air"? "More dense air displaces less dense air?" We've spent five…"
"Ah...I think I've found someone beside me who has ventured past the "myth" curtain, and the verbal harrangue from the little man behind it to ignore him. I just joined this forum, and finding this thread is a good sign I've…"
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