I am currently running a P61A in a newly built 850 sq ft shop. Due to the fact it is well insulated and only 2 small windows, i decided to run a line for the fresh air intake with aluminum dryer vent. On a cold night, the intake line gets covered with a thin layer of frost. Has anyone had experience with this and do you know if this can cause any condensation/rust issues with the stove? Thanks for any insight,