Water in Heating vents

Actually I don't have a basement. My house is on a slab. Every time it rains hard which is a couple times a year we get water in our heating vents. The ducts are under the slab I think. Does anyone know what is causing this and how to fix it? We have to pump the water out with a wet dry vac. Thank you.

 

Moisture should not be in heating ducts. This poses a situation where mold/mildew can grow as well as other biological organisms which can result in health problems such as allergies and respiratory problems. Water can enter ducts through leaks and as a result of improperly installed or serviced equipment. Condensation on or near coils of the system poses possible contamination of the system. Inspect and repair leaks. Examine coils which are supposed to remove moisture from air. Inspect condensation pan for standing water. Ducts should be inspected for leaks and insulated. A contaminated system can put you and your family at risk. A licensed, professional inspection of your system should be done.

 

Thanks for the post. This is not moisture in the vents, it is water. Lots of water. The heat can't get through because of the water. We have to pump the water out into the bathtub. A couple years ago I was having lots of problems with my breathing and skin and we had the ducks cleaned and sanitized but it wasn't to long after that water got in the ducks again so I am sure there is mildew and mold growth. I think we might have to dig, but who would we call? Help.

 

Call a licensed HVAC service that services heating and airconditioning systems. Once the repairs are made, the system will need to be decontaminated as well as ducts.

 

I have the same problem! Our tri-level's lowest level is half-below ground and has two sumps and still has 2 to 3 inches of rainwater in the pipes (not condensation). I have been reading up on companies who fix such hydrostatic water-table problems and they all seem to have very different approaches.

I truly think the answer is to fix the water drainage issue first and then replace pipes and ducts with plastic. Is there such a product as plastic duct work for use in slab foundations?