This one boggles my mind.
The local municipality is requiring the following in a finished basement:
In each room there must be a 6" rigid duct from the interior of the room to the outside of the building. On this duct there must be a barometric damper within 12" of the point where it exits the house and include a provision to exclude rain, birds.
There must ALSO be an additional 6" duct run from the interior of the room to the exterior of the dwelling into which a min 50 cfm exhaust fan is installed and wired directly into the light circuit. This must occur in each room without any windows to the exterior.
So understand, there are two ducts running from interior to exterior, one has an exhaust fan and one only a baro. damper.
This sounds like the dumbest system in all my experience in building. How in the hell is the customer supposed to prevent the warm air in the winter from being blown directly outside while at the same time sucking the cold outside air into the room and visa versa in the summertime?
Am I missing something here?
The local municipality is requiring the following in a finished basement:
In each room there must be a 6" rigid duct from the interior of the room to the outside of the building. On this duct there must be a barometric damper within 12" of the point where it exits the house and include a provision to exclude rain, birds.
There must ALSO be an additional 6" duct run from the interior of the room to the exterior of the dwelling into which a min 50 cfm exhaust fan is installed and wired directly into the light circuit. This must occur in each room without any windows to the exterior.
So understand, there are two ducts running from interior to exterior, one has an exhaust fan and one only a baro. damper.
This sounds like the dumbest system in all my experience in building. How in the hell is the customer supposed to prevent the warm air in the winter from being blown directly outside while at the same time sucking the cold outside air into the room and visa versa in the summertime?
Am I missing something here?