A venting system for a temporary shelter 2 that includes one or more vents 8 that are positioned in the exterior shell of the temporary shelter 2. Each of the one or more vents 8 may include a membrane 16 that is moisture vapor transmissive and resistant to liquid penetration. The membrane 16 may have a moisture vapor transmissive rate of at least 4,000 g/m 2 /day. The membrane 16 may be expanded polytetrafluoroethylene. The one or more vents 8 may have a size such that there is approximately 4 m 2 of vent 8 surface area in the exterior shell of the temporary shelter 2 per 20 m 3 of interior space within the temporary shelter 2.