"I have gotten 6700 PPM CO off a hybrid that had a bad valve. I have seen a 66' mustang 940 HP got 62,000 PPM CO. Flue gas meter go up to 8000 PPM CO, so to get the big number must use very high end testing meter. With Garage door…"
Thanks for those ideas. The garage door hardware on the ceiling could be a problem, and would be a big impediment if the ceiling were to be dropped to access the floor above. Junction boxes would have to be checked.
I was part of the team…"
"Ttwo blower doors? If so does the garage have a separate door to the outside, or only one door into the house?
Measure house with garage door closed (normal conditions), measure house with garage doors open(living…"
"The reason I dislike foam in the garage -- even under a layer of sheetrock, is that owners have the tendencies to puncture the and hang things from the ceiling. I'm not sure the stats, but after the kitchen, I believe garages are…"
"Don, Building Sciences Corp may have paired up with the BuildAmerica program to test. Your work at CMHC, the northern state/province universities. In Washington State - the people at the WSU building/energy efficiency…"
"the very big thing is sealing the return air. When the fan is on and not sealed will suck the car gases in to the building. I seal the return first. To prove the return is sealed I use fog like used in the 70' disco…"
""Avoid the foam"???
VOC's - one should be ventilating that area & they should be gone before anyone regains access
CO - remember the "P" in the GWP piece stands for potential & with the fuzzy math they used... well…"
Thanks for the leads. I was the manager of the CMHC research. I recognize that we have established that garage-to-house air movement exists, and that it often brings in polluted air. What I am looking for now is the practical side of air…"
"Don, I would also do an internet search or ask for queries about indoor air quality, Alaska (or province) and garage. I know this has been studied and researched by a lot of the universities and building science groups. The number…"
"Bud, CMHC tested the flow vs. pressure performance of a Saskatchewan loop back in 1987. The report is likely still around but essentially the looping just reduced the flow rate compared to a straight inlet, by introducing a 180 degree turn. The test…"
"The NPP testing that I did was in the early eighties. We simply measured the cross-wall pressures through any wall orifice or opening we could find, and then graphed the pressure differences against height to find the P=0 intersection. On a calm…"
"As someone said, the easiest way to check for neutral pressure plane is with a smoke stick on a calm day. Crack a casement window or door, run the smoke up the small crack. Does the smoke come in or go out? Sometimes you see the NPP within the…"
"The 300 cfm number is in the right ballpark. CMHC (in Canada) tested many fireplaces, both masonry and metal, twenty years ago. We saw some that would do 1000 cfm (big masonry with roaring fire) and some manufactured units that were in the order of…"
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