White Dust From Air Vents

When the mist lands on furniture or other surfaces and dries it can sometimes leave behind the dried mineral deposits or white dust.

White dust from air vents.

When we have the air conditioner on the dust blows into the house. Jump to latest follow 1 7 of 7 posts. Discussion starter 1 jan 6 2014. White flakes powder coming from the air conditioning vents model e90 e91 e92 e93 3 series vehicles produced from may 31 2006 to september 9 2007 situation the customer states that at times white flakes or powder comes from the air conditioning vents.

This dust is being made in your car. It is not coming from outside the car or the cabin air filter would stop it. Sealed ducts prevent dust. Now the white dust could be aluminum oxide or aluminum rust as the fins break down.

New home has excessive dust coming through air vents what to check. White powder white dust in air vents. Joined jan 6 2014 2 posts. We just moved into a new home and the air vents blow dust when the ac is on.

Hey folks i tried searching the forum for any previous posts on the this topic. For most people the white dust is nothing to be concerned about. White dust is usually caused by mineral content in the water that goes into a humidifier. Your a c evaporator is the source of this white powder.

Seal the gaps around the ductwork where it vents into the room and you should notice a big difference in your dust levels. I live in a new suburb where home building and construction is still going on all around us. The evaporator is made of tubes covered with aluminum fins. The dust normally has a grit to it rather than normal dust you d find around the house.

Cause the cause is surface oxidation of the evaporator in the heating and air. My guess is that the problem is not dust coming through the ducts but coming in from around the ductwork and pulling dust into your living spaces from the attic. The dust can also be found in the air conditioning vents tucked up against the windshield and on the front of the passenger window trim.