I am curious about how the actual flow rate was measured. Typically, a door opening is utilized as an instrumented flow path. At the door, one could measure by the pressure drop through a calibrated venturi, but in that case there would be a pressure drop and not only would that cut the actual flow rate of the hood, but there would be some house leakage not measured. Alternatively, if there were also a fan in the path keeping the house pressure at zero to the outside, while also measuring the flow through the fan (by whatever means), then the flow rate measured should be the static value for the entire hood system. Of course, without the test fan providing zero differential, the actual flow will be less depending on where the MUA is sourced. No magic is involved. kas Correction: In an early message above, I asserted: "A fan at the hood can more easily overcome flow resistance between the hood and the outdoors, but normally this resistance is small, a few tenths of an inch w.g., so attic and roof mount fans work fine when properly sized." I now doubt that it matters much whether the restriction is before or after the fan, as most fans have fan curves that are based on total pressure drop around the path and do not differentiate between pushing and pulling. Differences could result from turbulence interacting with structures on one side or the other of the fan, and in such cases the actual flow might differ slightly for the same fan. I don't know how VAH squirrel-cage blowers might behave in this respect.

That is a nice peony patch! You might want to remove the tree seedling over to the left; a pair of pliers to grip it works well. If you wait, it may send roots into the peony's area so there will be more disruption as the seedling gets larger.

MissSherry, i am always amazed with your knowledge of these things. I was hoping for you when I was looking for the sea slug looking thing on my coneflower a while back, but I think I did figure that one out. Took me hours, but once something gets stuck in my head it's hard to let it go. I did identify a milkweed assassin bug nymph today, but with something like these little barrel things I don't even know the words to search for.

Echeveria agavoides "Romeo" found while looking up Romeo. Romeo shows much more red. But at least I am sure it's agavoides. Thanks luci. Kara, could it be some sort of hybrid for other Crassula I have. I haven't seen blooms on them either this year. This is a new seedling. That's why I'm so confused. Any how, I must re-pot and bring in for the winter I guess. Thank you for responding.