You can definitely work it to your advantage in some situations. Last time I used one it was in an old apartment building which had AC only in the common hallways. Our unit’s giant windows and about 10,000 coats of paint on everything made the exterior walls functionally airtight compared to everything internal to the building, so creating some negative pressure pulled in “free” conditioned air from the hallway. The only downside was turning our apartment into a sink for everyone else’s cigarette smoke and cooking smells lmao
You can definitely work it to your advantage in some situations. Last time I used one it was in an old apartment building which had AC only in the common hallways. Our unit’s giant windows and about 10,000 coats of paint on everything made the exterior walls functionally airtight compared to everything internal to the building, so creating some negative pressure pulled in “free” conditioned air from the hallway. The only downside was turning our apartment into a sink for everyone else’s cigarette smoke and cooking smells lmao