The old ducts probably rusted away from the water seepage so someone simply removed the rusted material which left a round tunnel for the return.
Water in floor vents.
If it is only in one vent you need to first eliminate the possibility of an interior source such as over watering a house plant a leaking aquarium or someone spilling water nearby.
Use a dish cleaning tool like a scrub brush or sponge to clean the slats of the vent and other narrow crevices.
I bought this home 1 yr ago and was a flip home.
What is the best way to fix this situation.
The water in the ducts can initiate the growth of mold.
My vents new by.
One vent has completely corroded on the bottom then and the ground water seeps in and fills that whole section of vents.
Wet your tool with water apply soap to it and clean each vent.
In this room the two floor vents fill with water when we get rain.
Water in buried heating and cooling ducts can cause serious health problems.
Not if the water is seeping in through hairline cracks in the slab.
If you see water in any vent you should examine all of the other boots and ducts for water.
Only when i run the dish washer and run the washing machine.
Clean your vents in warm water and dish soap.
Ldapkus linas dapkus cmi january 4 2009 7 55pm 5.
Each time the heating or cooling system operates the air moving through the ducts can blast millions of mold spores throughout the house.
Afterwards metal or plastic vents can air dry or be wiped dry with a clean dry rag or paper towel.