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ArishMell · 70-79, M
Basically until you can no longer smell it, but how it takes to dissipate depends on the size of the rooms and the amount of ventilation you can give them.
This once happened to me, but leaving the front door open and opening the back door wide so the wind could blow through cleared the gas within about half an hour. Mind you, that was a small house: only three rooms in a row downstairs..
This once happened to me, but leaving the front door open and opening the back door wide so the wind could blow through cleared the gas within about half an hour. Mind you, that was a small house: only three rooms in a row downstairs..