How to Clean Air Vents in House: Step By Step Instructions. 1 Step 1: Gather the Right Tools. If you’re looking for how to clean air vents in the house, then gathering all the necessary tools is critical. 2 Step 2: Cover all Supply Registers and Clean. 3 Step 3: Turn on Fan. 4 Step 4: Turn off Power. 5 Step 5: Unscrew Duct Covers. More items
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