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Unusual vent size and insulation
I inspected an oil furnace that had a vent running to the exterior side wall. The pipe coming out of the furnace has been reduced to about half of the original pipe (Is that allowed because of the fan assist?) Some insulation type material was placed between the vent and the floor joists but I wasn't sure if that was ok to do. The vent had a fan assist at the end just before going to the exterior.
The whole setup looked strange but before I recommended correction I was hoping to get some feedback.
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