Hi,
I was diagnosed several months ago with a rare lung disease (hypersensitivity pneumonitis) that, in my case, is caused by bird dander and bird-poo dust. My pulmonologist would prefer that I get rid of my birds, but I'm fiercely opposed to that, so he's OK for now with my attempts at remediation.
In addition to taking other steps, I turned the bird room into a negative pressure room, using a high-tech exhaust fan running 24/7, to keep contaminants from migrating to other parts of the house. The problem, besides wasting electricity, is in controlling the humidity. As I type this, the room temperature is a comfortable 74 degrees, but the relative humidity is 61%, the dew point is 61%, and the wet-bulb temperature is 66%.
I need to maintain the humidity at about 40% year-round, which is somewhat of a challenge here in the Washington, D.C., area. I'm guessing that the easy solution is to simply turn off the exhaust fan except when entering or exiting the room. But if that results in the airborne contaminant level being too high, then the approach won't work. Is there some other solution that can be tried? As a next-to-last resort, I can have a bird room built in the back yard, but that'll cost a fortune.
Thanks,
David
I was diagnosed several months ago with a rare lung disease (hypersensitivity pneumonitis) that, in my case, is caused by bird dander and bird-poo dust. My pulmonologist would prefer that I get rid of my birds, but I'm fiercely opposed to that, so he's OK for now with my attempts at remediation.
In addition to taking other steps, I turned the bird room into a negative pressure room, using a high-tech exhaust fan running 24/7, to keep contaminants from migrating to other parts of the house. The problem, besides wasting electricity, is in controlling the humidity. As I type this, the room temperature is a comfortable 74 degrees, but the relative humidity is 61%, the dew point is 61%, and the wet-bulb temperature is 66%.
I need to maintain the humidity at about 40% year-round, which is somewhat of a challenge here in the Washington, D.C., area. I'm guessing that the easy solution is to simply turn off the exhaust fan except when entering or exiting the room. But if that results in the airborne contaminant level being too high, then the approach won't work. Is there some other solution that can be tried? As a next-to-last resort, I can have a bird room built in the back yard, but that'll cost a fortune.
Thanks,
David
source https://hvac-talk.com/vbb/threads/2242443-Humidity-controlled-negative-pressure-room?goto=newpost
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