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I recently finished my boiler installation and has been up and running for about 2 weeks now, I have a furnace and ac in attic ,I noticed a drip of condensation coming from supply register in master bedroom,my belief is that warm air in room is condensing with cool metal boot in attic, just wondering if i should close all supply registers in house ,but i still have return grills that i can't close, or do i run the fan only on blower in attic a couple times a week to keep things dried out?