lol okay
So I was doing some reading up on in-home COVID isolation protocols and one of the things I found was that a reasonable way to measure air exchange adequacy is to check carbon dioxide PPM counts, and open windows enough keep the CO2 count under 800ppm. So it's a pretty high number really, but - still, that's the number.
And that makes sense if you think about it, right? So I dug out my old greenhouse CO2 meter and set it up to see what we're looking at on the main floor - which is kind of serving as a buffer floor between the ground and upper floors as housemate isolates on the ground floor - and came up with a nice tight reading of... 526ppm... in a room with no open windows.
No nobody's really hanging out in that space so maybe it's gonna be kinda artificially low but that's still a really good number, so I went up to the smallish room where Anna and I have been hanging out all night and which has even more ventilation (one forced air register in, the door to the hallway out) checked that...
...and got a nice tight 620ish. In a small room with two people and no open windows, and one HVAC register.
And it's one thing to be pretty sure I run a nice tight HVAC ship, particularly given all our givens, but it's another thing to have some raw numbers that say yes, in fact, your fresh-air air exchange system is working really well, and this is one goddamn tight HVAC ship.
Arguably, it's too well. Once isolation times are over, I'll be closing it back up for heat efficiency, and now I have an air exchange target I can measure.
Brilliant.
Also posted to ソ-ラ-バ-ド-のおん;
comments at Dreamwidth. Please comment there.
And that makes sense if you think about it, right? So I dug out my old greenhouse CO2 meter and set it up to see what we're looking at on the main floor - which is kind of serving as a buffer floor between the ground and upper floors as housemate isolates on the ground floor - and came up with a nice tight reading of... 526ppm... in a room with no open windows.
No nobody's really hanging out in that space so maybe it's gonna be kinda artificially low but that's still a really good number, so I went up to the smallish room where Anna and I have been hanging out all night and which has even more ventilation (one forced air register in, the door to the hallway out) checked that...
...and got a nice tight 620ish. In a small room with two people and no open windows, and one HVAC register.
And it's one thing to be pretty sure I run a nice tight HVAC ship, particularly given all our givens, but it's another thing to have some raw numbers that say yes, in fact, your fresh-air air exchange system is working really well, and this is one goddamn tight HVAC ship.
Arguably, it's too well. Once isolation times are over, I'll be closing it back up for heat efficiency, and now I have an air exchange target I can measure.
Brilliant.
Also posted to ソ-ラ-バ-ド-のおん;
comments at Dreamwidth. Please comment there.