Consider reorienting your room so that the long wall is an exterior wall.
2. Relocate the room to an outside corner so that two exterior walls are available.
3. Locate the room as an extension off an exterior wall to allow for three exterior walls.
4. Consider venting through the roof as well as the wall(s).
5. As room surface area plays a key role in the vent area calculation, consider reducing room size or height.
6. Similarly, within the vent area formula, if the strength of the pressure resistant structure is increased the required vent area is reduced.
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