Good call Robert, Black vent pipe on one side, loooooong flexible bathroom exhaust pipe on the other. Surrounded by 8-10 inches of blow in cellulose insulation. I was impressed by the workmanship, as I suppose this might provide the required clearance, but this is a pretty significant hole in the insulation. I can envision a future where more insulation is added, either as part of a whole house improvement, or as a result of condensation in the bucket during the winter if someone does not use the heat-lamp while showering.