Which way does the air flow within the house?
Might be an odd question but I have been trying to understand this for the longest.
With all the windows closed in my single-story house + basement, how can I figure out the direction of natural air flow. I assumed that due to stack effect, I would be able to locate those positive & negative air pressure differences to identify air infiltration/exfiltration.
My (failed) attempt at solving this was to buy a (differential) manometer and take air pressure readings, comparing different areas/rooms of the house. The result: inconclusive as my manometer gives readings that are seemingly all over the place and inconsistent.
A more practical approach was figuring out air flow when the furnace is on. I figured this would help explain temperature variations room to room. For example, there is one room where when I close the door, I can feel air rushing into the room at the jambs…which makes me believe this room is under overall negative pressure & sucking up air from other rooms.
So I guess my question is – how does one accurately measure a house to determine air flow & pressure differences?
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